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Non-expert information!Quick Charging can, and will, accelerate the degradation of your battery's capacity over time! (self.Android)

chriscosta77Note 4 - 5.0.2 TW Rooted Stock, Nexus 7 FHD - Rooted Stock, 5.1 が 投稿

I saw another battery post that had so many things wrong. Rather than nitpick that mess I just wanted to post some facts and guidelines for Li-ion batteries. I will try to use laymen's terms to keep it easy to understand.

Edit

Here's a study that focuses on battery chemistry, and not marketing terms. Relevant quote below.

In their present study, the researchers exposed different battery electrodes to twenty-five charging and discharging cycles each, at three different rates and measured the elementary distribution of the electrode components. The scientists could show that during fast charging, manganese and nickel atoms are leached from the crystal structure. In their investigation, the researchers spotted defects such as holes in the electrode with up to 100 microns (0.1 millimetre) diameter. The destroyed areas can no longer be utilized for lithium storage.

End Edit

  • Faster you charge or discharge a Li-ion battery, the warmer it gets. Full stop. Yes, this includes Quick Charging, whether you like it or not. Sorry folks, physics and chemistry cannot be overcome.

  • The warmer a battery gets, while being used or charged, the quicker it's capacity deteriorates. This kills the battery (ie, "loses capacity faster than normal"). In extreme cases an overheating battery means it is no longer safe to use. Dispose of properly according to local laws in your area.

  • Inactivity for periods of 2 months or more, at too low a voltage, or too high a voltage loses you capacity. That's why batteries are charged to ~40% at the factory.

  • There is no "memory effect" and discharging below 20% stresses the battery. Try not to do that. Steeper discharges are not optimal either. Partial charges are the best.

  • Modern cellphone's contain circuitry that determines the voltage. However, if you're using your phone at a full charge, while plugged in (aka parasitic charging), you're over stressing your battery. Ideally when it hits 100%, unplug your device, then use it down until 60%-80% before putting it back on the charger.

  • Use the charger and cable designed for your phone whenever possible. Cheap knockoff chargers fluctuate wildly while charging. Cheaply made cables can short easily.

  • While most batteries are sealed into phones, unlike my Note 4, it should be said, NEVER carry Li-ion batteries in such a way as a dead short is possible. Unless you like thermal runaway, de-gassing (ie, like a mini road flare), and even explosions. Carry loose batteries in plastic cases designed to carry batteries. Keep away from stray metal objects (eg, paperclips, hairpins, keys, and coins).

  • If your device and/or battery are getting very hot or de-gassing. Cover with a metal pot or glass bowl. Locate a fire extinguisher. Never pick up a battery that is exhibiting these behaviors. If outdoors, move away.

  • Sudden and strong physical shock can compromise battery integrity. Be leery about a battery that's been abused. Watch for any signs of damage. For loose batteries, protect them from punctures and scrapes of the insulating coating.

I know this post is long, but it is important. Battery safety and usage should be taken seriously. Batteries seem like such a mundane thing that is taken for granted. We often put little thought beyond the percentage when thinking about our batteries. If not taken care of properly, batteries can cause damages to devices. But more importantly, personal injury can occur.

If anyone has any questions, feel free to ask. I've been a battery hobbyist, in one form or fashion, for a long time. Since 2009, I've used high powered Li-ion cells in e-cigs, and high powered mechanical (ie, no protection circuitry) e-cig mods. All types and sizes. I wanted to know as much as possible about stuff I was putting near my face. So I've experimented, and researched this topic extensively.

Bonus safety tip: Never leave batteries charging unattended.

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[–]justalibrary 442ポイント443ポイント  (29子コメント)

Just use your phone.

[–]Dedicated4life 37ポイント38ポイント  (2子コメント)

But if I use my phone the battery will degrade faster!

[–]AngelDE98Moto G (2. Gen.) | Nexus 7 (2012) | OUYA 10ポイント11ポイント  (1子コメント)

But OP said not using your phone makes the battery degrade in specific cases, too!

[–]KillmeplsokZenFone 2 4G/64G Lollipop 5.0 4ポイント5ポイント  (0子コメント)

So your battery degrades no matter what? What a shock!

[–]toxicpaulution 84ポイント85ポイント  (17子コメント)

As someone who upgrades often, I think the exact same. So the battery turns to shit, change it.

[–]cttttt 13ポイント14ポイント  (4子コメント)

Funny how three, maybe five years ago, it would be crazy talk that a $600 device would be built to fail in a few years with no user serviceable parts. Now it's completely accepted.

Kinda sad.

[–]chriscosta77Note 4 - 5.0.2 TW Rooted Stock, Nexus 7 FHD - Rooted Stock, 5.1[S] 7ポイント8ポイント  (3子コメント)

And people wonder why consumer debt is so high.

My grandfather owned a TV repair shop. He used to talk about how he had to literally rewire a TV using schematics. He actually sold rebuilt TV sets, with vacuum tubes in them. These days, most electronics are not serviceable. Not in the old sense of the word. But back then, stuff was built damn rugged.

I've got a soft spot for vintage electronics, and appliances. Primarily because they seem to last forever. I still have a GE electric knife from the early 1950's. My grandmother bought it brand new from a Montgomery Ward department store. It was considered a luxury item back then. You can't find a more powerful electric carving knife today. It has enough torque to make my hand twitch when pressing the trigger all the way. I've got it today. It still works amazingly well, and I use it often. I can easily dismember an entire pig with it.

/tangent

I guess my point is that people used to hold more reverence for their belongings. Not because they were poor or anything, but because manufacturers expected their stuff to last damn near forever. People expected quality, and took pride in American manufacturing. Now days, things like smartphones, aren't manufactured to last very long at all. They're not even made in this country anymore. Planned obsolescence, I suppose. If people stopped buying new stuff, the economy would tank.

[–]n0tj0sh3332GB Droid Turbo / 16GB Nvidia Shield Tablet + Moto 360 1ポイント2ポイント  (2子コメント)

The main reason why people upgrade is not because they don't "value" their belongings it is because computers and cellphones especially have been such a fast moving industry they are just trying to keep up with the technology. Most electronics that aren't serviceable aren't really expensive anyways. What really puts people in debt is buying a whole bunch of things they can't afford or moving in houses that are too expensive, it's not because they don't care if they are keeping cellphone battery past 3 years.

[–]bobdoleraisetaxes [スコア非表示]  (1子コメント)

Yes. There will always, always be things to buy. We could be in medieval ages and still have lots of things people would buy with their credit cards and loans.

It's a poor excuse and a cop out to blame debt on the fact that new things exist out there that you may potentially want.

Get some self control.

[–]n0tj0sh3332GB Droid Turbo / 16GB Nvidia Shield Tablet + Moto 360 [スコア非表示]  (0子コメント)

Not really a cop out or an excuse its just a fact if you buy things you can't afford you will go into debt, I don't think anyone has ever really believed that it's anyone's fault but their own when they go into debt from spending money on shit they can't afford

[–]CrisKrossed 34ポイント35ポイント  (10子コメント)

lol, I don't upgrade often and I think the same. I've had the same crap phone for 2 1/2 years, and I plan on getting the s6 at the end of the month. I'm hoping it'll last me 3 years. Plus, it's only about $45 to replace the battery according to a post I saw here.

[–]toxicpaulution 6ポイント7ポイント  (6子コメント)

Yeah I know. I have my phones roughly a year, I either buy a battery pack or I buy a new battery.

[–]CrisKrossed 5ポイント6ポイント  (0子コメント)

Yh, the only reason I can tolerate the battery I have now is b/c im too busy at work to kill it until I leave.

[–]jellybergΠΞXUЅ 4, stock 5.1 2ポイント3ポイント  (4子コメント)

You could a new phone every year? Why?

[–]toxicpaulution 5ポイント6ポイント  (0子コメント)

Because technology is something I fancy. I just upgraded to the nexus 6 from my nexus 5.

[–]JarrettPHTC One M7 | HTC Evo 3D 3ポイント4ポイント  (2子コメント)

Why not? If that's what he wants to do then so be it.

[–]jellybergΠΞXUЅ 4, stock 5.1 5ポイント6ポイント  (1子コメント)

Oh yeah I don't have any objection just trying to understand why s/he wants to do it.

[–]PM_ME_DICK_PICTURESOnePlus One | iPhone 5S 1ポイント2ポイント  (0子コメント)

it's fun to try out new devices often, that's why i have like 5 phones lol

[–]jassalmithuSony Xperia Z3 5.0.2, Onda V975M Lollipop 5.1@ 1ポイント2ポイント  (2子コメント)

What 2 1/2 years old phone you have, that battery cost sounds like almost as much as the phone would be worth now.

[–]CrisKrossed 3ポイント4ポイント  (1子コメント)

Not even. My dad cheaped out on my phone big time, and got me the galaxy exhibit. The phone was $40 and he got a mail in rebate -_-. I have less than 500mb of usable space.

[–]rainydayseverydayNexus 5 | Moto e 2ポイント3ポイント  (0子コメント)

I would never be able to live with that

Edit: I did live with it. I had an HTC wildfire S for 8 months and it was my worst nightmare.

[–]Tugalord 2ポイント3ポイント  (0子コメント)

Maybe not everyone can afford to/wants to replace their phone every year.

[–]turbodragon123Moto X (2014), Nexus 7 (2012) 16ポイント17ポイント  (2子コメント)

Exactly! My old Nexus 4 has been charged with my Quick Charger every night for more than two years and the battery seems just like new. Is it so? Probably not, but the loss has been so small that is negligible.

[–]packer126 0ポイント1ポイント  (1子コメント)

Do you turn your phone off when you charge it?

[–]turbodragon123Moto X (2014), Nexus 7 (2012) 1ポイント2ポイント  (0子コメント)

Nope, never.

[–]JespyT-Mobile Galaxy S6 EDGE 11ポイント12ポイント  (1子コメント)

Yep, thank you. Exactly what I say. Stop worrying about this shit. Unless you're planning on having your phone for 5 years then yeah MAYBE it might be a concern, but even with my S6, it's only about $45 to get the battery replaced so it's no big deal.

Quick Charging is amazing, everything has it's pros and cons, but the pros outweigh the cons in this case.

If you are worried about this then don't use your phone!

[–]reductaseGalaxy S6 | VZW 4ポイント5ポイント  (0子コメント)

Quick charging on the S6 is amazing. I can really tax the battery while at work, throw the phone on the charger for 45 mins while I am in the shower/getting ready, and then go out all night and sleep somewhere without having to worry about the battery dying. It's definitely going to have some adverse effect on the battery but I'd gladly trade that for the super fast charging.

[–]Freddit- -1ポイント0ポイント  (0子コメント)

Exactly. If your battery become useless it's because it was faulty or you're not upgrading your phone soon enough.

These batteries will last two years, regardless of fast/quick charging.

These battery nazis need to chill out.

[–]waxox 0ポイント1ポイント  (0子コメント)

Amen. Don't let this fearmongering horseshit waste any of your life.

[–]SmLSugarLumpsMoto X (2014) 5.0 & iPhone 5s [スコア非表示]  (0子コメント)

Exactly, many people on this subreddit over analyze and try too hard solve problems that don't exist.

[–]CarlFriedrichGaussMoto X (2013 where's our lollipop) 13ポイント14ポイント  (0子コメント)

I'm not sure if the batteries in electric vehicles are the same type that's in phones, but there are very well documented cases of Nissan Leaf batteries losing a good percentage of their battery capacity after spending time in hot Texas and Arizona weather. The degradation rate supposedly follows the Arrhenius expression too, so the battery degrades exponentially faster with increasing temperature rather than linearly. This is why Tesla uses active cooling for their batteries, and Nissan is rumored to put it in eventually.

Battery degradation has been analyzed and discussed to death in EV forums since EV batteries are orders of magnitude more expensive and most Americans don't get a new car every 2 years. I would go there to learn about batteries instead of the smartphone scene where every internet blogger and redditor thinks that they have an honorary degree in electrical engineering for being a smartphone enthusiast.

[–]Charwinger21HTCone M9 46ポイント47ポイント  (21子コメント)

And yet, your post didn't really address quick charging's effect on battery life either.

Your post has some fairly good tips and tricks to maximise battery life, but it also has a lot of broscience that will have a negligible effect on battery life, especially with modern power management chips. (e.g. a lot of the cheapest cables and charges out there are fantastic, like Monoprice, Amazon Basic, Anker, Aukey, ZeroLemon, etc.. You're more likely to encounter a shitty fake cable/charger/battery than you are to encounter a shitty branded one).

That being said, there are multiple peer reviewed studies showing that charging at 1 C or below (~3 A for phones, with the exact number depending on battery size) has a negligible effect on battery life compared to slower charge rates, and you can even get up to 2 C (~6 A) before you start running into issues with current battery technology (which can be mitigated by reducing heat through other methods).

[–]saratoga3 2ポイント3ポイント  (0子コメント)

Thats a great link (and everyone should read it), but keep in mind lifecycle tests are only valid for a specific anode/cathode/electrolyte combination, and there are many thousands of different combinations used commercially that are optimized for different applications. Different electrolytes in particular have very different sensitivity to charge rates and temperature (although higher is always worse as you point out) because the addition of each additive to the electrolyte changes the range of thermodynamically favorable side reactions. If a chemistry is well-optimized for an application, side reactions will be minimized, and each recharge cycle will have a minimal effect on the overall cell.

For this reason, its possible that a company could pick a cell that tolerates rapid charging a lot better than the average cell (although perhaps at the cost of some total capacity/weight/cost/etc) or to pick one that's a lot worse. A great example of this is the cell Nissan picked for the older LEAF cars. They worked when tested in cooler conditions in Japan, but when people in Arizona bought them, the extra temperature caused a lot of the cells to fail rapidly even though most other battery-powered cars work fine under those conditions. Getting the chemistry just right can make a huge difference to cell stability.

I'd love to see tests of a QC approved battery just to see what its life cycle looks like, but I haven't seen anyone do it, probably because its so time consuming.

[–]shenye 52ポイント53ポイント  (19子コメント)

I saw a few too, they are definitely wrong. I wrote a post on battery tech earlier this year. Here's a copy of the part about longevity:

Tips for improving lithium battery longevity

  • Lithium batteries do not require conditioning, where you have to charge the battery for 24 hours on first charge.
  • Leaving your phone on the charger after it’s charged won’t cause overcharging, except in very rare cases where the charging circuit malfunctions. Leaving a battery at 100% for long periods is not advised.
  • Use fast charging sparingly where possible, higher temperatures quickens deterioration.
  • Avoid charging at temperatures below freezing as subfreezing charging can cause irreversible electroplating of metallic lithium on the anode.
  • Avoid discharging to 0%, it’s bad for the battery’s lifespan.
  • Store lithium batteries at ~40-50% to reduce deterioration, also disconnect them from the device if possible.

[–]Isogen_Moto G 2013 16ポイント17ポイント  (3子コメント)

Avoid discharging to 0%, it’s bad for the battery’s lifespan.

That's almost impossible to do on most phones with proper battery management. However, draining the battery until the phone turns off and leaving it like this for weeks can cause issues.

Store lithium batteries at ~40-50% to reduce deterioration, also disconnect them from the device if possible.

Storage charge for LiPo/LIon is around 3.7-3.85v depending on the exact chemistry. 50% charge won't necessarily be the proper storage voltage.

[–]shenye 10ポイント11ポイント  (2子コメント)

  1. Bad battery calibration could potentially cause the device to black out at 0%.

  2. Yep, but for the average person who are about to store their phone in their drawer and don't want the battery to deteriorate, the 40-50% figure is usually okay.

[–]Isogen_Moto G 2013 5ポイント6ポイント  (0子コメント)

  1. That's true. I did not consider that. This could be even a bigger issue if someone is running non OEM batteries.

  2. True. But for long term (weeks) storage, imo, it's just better to go by the actual voltage. CPUZ and other tools can give you battery voltage. Just for peace of mind really.

[–]bobloadmire 0ポイント1ポイント  (0子コメント)

In regards to #1, no it can't. The chip in the battery itself is hard coded to cut power at a set deltaV so it doesn't matter what the phone thinks the battery state is. That's why some phone with crap batteries die unexpectedly at 50% charge.

[–]dafootballer 2ポイント3ポイント  (10子コメント)

So leaving my phone overnight connected to a quick charger is bad? Just wondering since putting my phone on my wireless charger at 100% makes it turn off and on.

[–]reductaseGalaxy S6 | VZW 9ポイント10ポイント  (5子コメント)

So leaving my phone overnight connected to a quick charger is bad?

No, the circuitry in your phone will stop charging when necessary. The whole "don't leave batteries on the charger" is a relic from NiCd/NiMH rechargeable days. Modern devices have sophisticated circuitry that tightly controls charging voltage and current.

Fast charging does accelerate the battery aging process; however, given the two year lifespan of smartphones, the engineers decided that fast charging was worth it. Just use the device with the charger it came with and you'll be fine.

[–]dafootballer 0ポイント1ポイント  (0子コメント)

Thanks for the response, I assumed all the things you said and products do have a shelf life, I don't plan on holding onto this thing for more than 2 years anyway.

[–]Isogen_Moto G 2013 -1ポイント0ポイント  (3子コメント)

Modern devices have sophisticated circuitry that tightly controls charging voltage and current.

I just want to point out that this is true of quality chargers. Shitty chargers can be quite out of spec, esp. if they are using fake/clone parts that are out of spec.

For example, a while back while looking for a 18650 charging module/IC, I came across a 1S LiPo charger module using a fake LTC 4056 that was way, way, way out of spec for the input voltage and currents.

[–]reductaseGalaxy S6 | VZW 2ポイント3ポイント  (2子コメント)

Oh, certainly for chargers that charge naked cells you have to pay attention. However, for smartphones, the charging circuitry for the li-po cell is inside the phone, not in the charger. The charger just supplies power to the charging circuitry in the phone. That's not to say you can't wreck your phone with an out of spec charger, but as long as you can get a steady 5v to the phone it will handle the rest.

[–]Isogen_Moto G 2013 0ポイント1ポイント  (1子コメント)

That's not to say you can't wreck your phone with an out of spec charger, but as long as you can get a steady 5v to the phone it will handle the rest.

That was exactly my point. Most PMICs aren't designed to handle voltage inputs over 5.2vish and if a shitty charger say supplies 7v that can definitely cause issues.

[–]saratoga3 2ポイント3ポイント  (0子コメント)

That was exactly my point.

I think what he means is that if you have a phone, its got it's own regulator before the charger IC, whereas with a bare IC its actually really sensitive to voltage. But if its regulated, not so much, as long as you don't burn out the regulator.

Most PMICs aren't designed to handle voltage inputs over 5.2vish and if a shitty charger say supplies 7v that can definitely cause issues.

The actual USB spec requires support for up to 5.5v, and typical maximum rated voltage is usually more like 7v. Not that I'd recommend running out of USB spec, but for a phone (as opposed to a bare IC) it won't really do anything to the battery right up to the point where you burn out the USB port.

[–]shenye 0ポイント1ポイント  (2子コメント)

My overnight charger is actually a 4-port USB 2.0 hub on a 1.2A charger. Charge is slow, but more than enough for 100% by morning.

[–]DoctorSteveNexus 4 0ポイント1ポイント  (1子コメント)

1.2a charger sounds like hell.

[–]CassiuzMod | Note 4 0ポイント1ポイント  (0子コメント)

I have a 1 A charger that I use only for overnight charging. It's hugely slow to charge my Note 4, but I keep my higher current ones (including the fast charger that came with it) at my desk(s), as that's where I need a quick top up. When I go to bed I just plug it into the slower charger on the side and know that it will be done by morning.

I guess I could get a better charger for there, but I just don't see the need really.

[–]numanairmoto x (rw) 0ポイント1ポイント  (0子コメント)

It should be fine. The phone will charge and discharge the battery a little bit at 100%. It won't overcharge.

[–]sourcex 1ポイント2ポイント  (1子コメント)

Why is it bad to discharge to 0%?

[–]CassiuzMod | Note 4 6ポイント7ポイント  (0子コメント)

The batteries just don't like having no charge in them, it's a more unstable state than when they are storing charge.

But don't worry about it, the phone will never let you discharge to an actual 0%. The 0% that your phone displays, is not the battery's 0%, there are safeguards in place to stop it dropping that low.

[–]savagebunny 9ポイント10ポイント  (3子コメント)

Also, for the users who have phones which have "Quick Charge" or "Turbo Charge" aka my Droid Turbo which throws 1.5A+ into charging the battery... You can use a normal charger to charge your phone. Our phones auto detect the voltage/current input and sets the charge speed at that.

[–]joker47manGalaxy Note 4, FireKatN4 -2ポイント-1ポイント  (2子コメント)

The Quickcharge isn't just pushing more current, it also charges at a higher voltage, like double or triple the voltage.

[–]reductaseGalaxy S6 | VZW 8ポイント9ポイント  (0子コメント)

It doesn't charge at a higher voltage, it's simply supplying a higher voltage to the charge circuitry in the phone, which then steps it down to an appropriate voltage for the battery. This makes it easier to supply higher wattage through a small cable; higher amperage at 5v would cause heating in small USB cables.

[–]savagebunny -5ポイント-4ポイント  (0子コメント)

Yes, forgot to mention that. Although my phone doesn't get blistering hot because Motorola designed the battery around QuickCharge, I really only should use it if I need it.

[–]nybreath 15ポイント16ポイント  (1子コメント)

You are completely missing the point, none is saying that fast charging is not going to deteriorate your battery, everything is going to deteriorate your battery, even not using it, cause it is a chemical agent that is subject to natural degradation.
The thing is that there is no proof that quickcharging is making a huge impact on batteries.
Quick charge will deteriorate your battery but if it is a 3-4-5-% every year, would you prefer to use quickcharge and change the battery after 3 years? or would you prefer to lose the quickcharge benefits for not spending 40-50$ to change the battery every 2-3years?.
I think it is a personal thing, but requiring to change a battery 2-3 years, personally, is completely acceptable, and the benefits are way more positive.

[–]n0tj0sh3332GB Droid Turbo / 16GB Nvidia Shield Tablet + Moto 360 5ポイント6ポイント  (0子コメント)

Yeah this is definitely just speculative, fast chargers specifically slow down after a certain point all on their own and phones have other ways of controlling the heating up element. The phone doesn't get any hotter than it would from playing games or other intensive apps and in the end it doesn't have much of an impact.

[–]sybauDevice, Software !! 7ポイント8ポイント  (2子コメント)

Nexus 6 came with quick charge as standard... So, as much as your response appears kosher from a purely common sense viewpoint, I don't think charging patterns matter that much, just plug it in when you need/want and don't fret over it.

The amount of stress that some people must get from a device that is intended to make your life easier is a bit ridiculous.

[–]Zahne1977Galaxy Note 4 5ポイント6ポイント  (0子コメント)

I'd happily replace my battery if it means having the convenience of a quick-charge.

[–]reductaseGalaxy S6 | VZW 6ポイント7ポイント  (6子コメント)

Modern cellphone's contain circuitry that determines the voltage. However, if you're using your phone at a full charge, while plugged in (aka parasitic charging), you're over stressing your battery. Ideally when it hits 100%, unplug your device, then use it down until 60%-80% before putting it back on the charger.

Where do you get the idea this stresses the battery at all? It's not even using the battery; it's getting power from the AC adapter. If you have a phone with a removable battery you can use it battery-less this way. What is "parasitic charging", something you came up with? Googling reveals nothing about this term.

[–]jcpbZ3C 5ポイント6ポイント  (2子コメント)

If you have a phone with a removable battery you can use it battery-less this way.

Negative. My SGS4 cannot be operated solely off a USB power source without a battery installed, official ROM and otherwise.

[–]reductaseGalaxy S6 | VZW -1ポイント0ポイント  (1子コメント)

Yeah, I guess you're right. I could have sworn my Droid X, SGS, and SGS4 worked without a battery. Still, the point stands that using your phone plugged in at 100% charge is not any more harmful to your battery's life than using it unplugged. The phone isn't getting power through the battery while plugged in.

[–]FreshOllieNexus 6 | Nexus 7 2013 | Moto 360 | Moto G 1st 1ポイント2ポイント  (0子コメント)

I have done research into this with my Nexus 7 in dash install and we have discussed this on the timurskernel subreddit (Private)

The nexus 7 will try to use as much power as possible from the USB, but it will also have to use power from the battery when it needs to draw more than 1.2A from the USB power supply.

This means that the nexus will "Operate" if you remove the data lines going to the battery making it think it has no charge in the battery, but it will actually throttle it's self to avoid drawing power from the battery in this case.

In any case, what OP is talking about with "parasitic charging" is where the device may have to draw current from the battery, which then means that the battery needs charging by the power supply.

Ever noticed if you plug your phone into a PC and use it at full brightness the battery still goes down? This is what's going on, but on a much smaller scale, because most phones can draw at least 1-2A from a charger and a PC can only deliver 0.5A on a USB.

Hope this makes sense.

[–]t0astter 3ポイント4ポイント  (0子コメント)

Are you sure about the parasitic charging thing? On my 2015 Macbook Pro (with Li-Ion battery), the battery life is measured in cycles. Meaning, every time 100% battery has been lost a cycle is incremented. When the battery hits 100% charge, it trickle charges which slows the rate of discharge. This causes the cycle count to increment slower, thus prolonging the life.

[–]jtaylor991 1ポイント2ポイント  (8子コメント)

On my Nexus 6, occasionally my phone will randomly get really hot, like hot to the touch, when not plugged in. Is there some sort of safety hazard I need to look into?

[–]ceshuerNexus 6 2ポイント3ポイント  (1子コメント)

I have a nexus 6 as well and this definitely doesn't sound normal. I would make sure you don't have any intensive apps running, and if you don't, I would think there was some hardware issue

[–]jtaylor991 0ポイント1ポイント  (0子コメント)

Next time it happens I'll take a closer look and talk to Motorola about it (mine is through AT&T, not Google).

A couple of times it was because the flashlight was accidentally activated, but other times it wasn't clear what was wrong at all.

[–]DanielKennethRegoAsus Zenfone 2 ZE551ML -4ポイント-3ポイント  (5子コメント)

Don't use a quick charger.

Edit: Sorry, I hit reply on the wrong post. Meant to reply to "So, with the S6, there is no option to turn off the quick charge feature. Is there any other way to prevent quick charging?"

[–]jtaylor991 2ポイント3ポイント  (4子コメント)

I charge with a 2amp charger at night...

[–]reductaseGalaxy S6 | VZW -1ポイント0ポイント  (3子コメント)

I am not sure if the Nexus 6 has proprietary fast-charging technology like some other phones, but you're best off using the official charger that came with the phone. For example, the Galaxy S6 charger actually communicates with the phone and steps up output wattage. Normally, it behaves as a 2A/5v (10W) charger, but when the quick charge circuitry is detected, it changes to 1.67A/9V (15W).

However, something sounds very wrong with your phone. It should not be getting "blisteringly hot" unless you're taxing the CPU/GPU with some application.

tl;dr: use the stock charger. get phone checked out.

[–]jtaylor991 0ポイント1ポイント  (2子コメント)

The stock charger was a Motorola Quick Charger, and I lost it :/

[–]reductaseGalaxy S6 | VZW -1ポイント0ポイント  (1子コメント)

Some quick research shows the stock charger to be a 2A/5v charger, nothing special. You're fine there, but you definitely need to look into that blisteringly hot phone. It might be an app that is constantly hogging CPU/GPU, causing massive battery drain and heat, or it could be a hardware issue, leading to an exploding battery. Try doing a backup and reset to stock, keep the phone stock for a few days, and checking for heat while idling. Typically these problems are due to a shitty app or widget, but it could be more than that.

[–]jtaylor991 0ポイント1ポイント  (0子コメント)

I do need to do a factory reset, so I'll do that soon.

[–]Aravindtop 1ポイント2ポイント  (5子コメント)

I have the DROID Turbo. And whenever I use the turbo charger, it gets REALLY hot, I mean REALLY HOT. And that's "normal". Does this mean my battery will be destroyed faster?

[–]kenotobarXT1225 0ポイント1ポイント  (1子コメント)

I use the turbo charger almost everyday with my Moto MAXX, it gets warm, but I wouldn't say that it gets warmer that when using any other charger...

[–]Aravindtop 0ポイント1ポイント  (0子コメント)

I can't say anything about the MAXX, since I don't own it. But for the turbo, the massive heat is "normal". Confirmed by Motorola when I talked to them and other Turbo owners.

[–]Fer22fMoto Maxx (Brazil's Droid Turbo) 5.0.2 Lollipop 0ポイント1ポイント  (1子コメント)

Exactly what he is talking about. I have the same "phone" and I avoid Turbo charging... 1 time per week is the maximum.

[–]Aravindtop 0ポイント1ポイント  (0子コメント)

I should really only use the Turbo Charger in emergencies.

[–]RallerbabzOnePlus One, rooted CM11S 1ポイント2ポイント  (1子コメント)

I've a question.

Like with laptops, when the battery is fully charged, the cable just directly provides power to the computer, thus not stressing the battery at all. Doesn't it work the same way on phones? If not, why?

I vividly remember being able to remove my battery from my old Lenovo laptop, while the computer keep running on the power provided by the charging cable. I assume it works that way with all laptops? Or is it only with removable batteries?

[–]lodc 2ポイント3ポイント  (0子コメント)

Many laptops are designed to run off AC power when it is available. Many phones are not. This is probably because laptops are very often used near AC power whilst phones are not, so it doesn't make sense to waste space and money on supporting the ability to run off AC for phones.

[–]loconessmonster 1ポイント2ポイント  (0子コメント)

TLDR quick charging in most cases causes your battery to heat up more than 'regular charging' therefore reducing the lifespan of your battery.

This applies to all batteries that I have run into. I have two chargers for my Eneloops and one of them takes all day to fully charge the batteries the other takes 4 hours. I just put away the quick charger, bought a few extra batteries as a 'queue' for when some of them run out and need charging, and use the slow charger.

For some quick charging is worth it because they intend on replacing the phone in a couple years, for others they want to hang onto the phone until it is literally falling apart and/or something 'truly better' comes along.

[–]flutterbye33 1ポイント2ポイント  (3子コメント)

I think I'll put my trust in the engineers who designed my phone and use the charger it came with, following the directions they wrote. I'm not looking for extra shit to worry about though, maybe this would be useful to someone that is.

[–]Flame_ChokeNote 4 - FireKatN4, Desire 816 - CM 12.1 unofficial 2ポイント3ポイント  (1子コメント)

I assume this post is in response to that earlier post stating QC has no effect on battery degradation. But one thing bothers me with both posts. What the hell is with the irrelevancy of stating barely tangent information such as this:

While most batteries are sealed into phones, unlike my Note 4, it should be said, NEVER carry Li-ion batteries in such a way as a dead short is possible. Unless you like thermal runaway, de-gassing (ie, like a mini road flare), and even explosions. Carry loose batteries in plastic cases designed to carry batteries. Keep away from stray metal objects (eg, paperclips, hairpins, keys, and coins).

If your device and/or battery are getting very hot or de-gassing. Cover with a metal pot or glass bowl. Locate a fire extinguisher. Never pick up a battery that is exhibiting these behaviors. If outdoors, move away.

Both posts barely meets good information how how fast it will accelerate battery degradation. The previous post manages to say 5% additional drop in capacity with no sources. If it comes to this measly percentage (for me that is), just use QC ffs. Honestly, there should just be a wide, controlled study on how fast QC can degrade a battery. That's the important part. I'm tired of these obvious answers "heat = kills battery" and god forbid they stay on topic. Obviously QC will accelerate degradation because of the greater heat generated but if it comes to being 1%-3% battery degradation over time annually then quite frankly I would just laugh and move on to using QC like I always have.

[–]neolithicera 1ポイント2ポイント  (6子コメント)

Does it matter when you get your phone if you charge it completely and then let it discharge completely? I've always heard this but it doesn't sound like science

[–]CassiuzMod | Note 4 11ポイント12ポイント  (0子コメント)

That was necessary for older battery technologies, but isn't needed for modern current batteries. Just charge it and use it how you want/need.

[–]EnddaAndroidExplained.com 6ポイント7ポイント  (1子コメント)

From what I can gather, this is a leftover habit from the nickel based batteries

[–]shenye -2ポイント-1ポイント  (1子コメント)

It will calibrate the battery, but won't affect the overall capacity. Worst case is that the percentage your phone shows differs significantly from the actual percentage. Lithium based batteries don't require the initial conditioning which the previous nickel cadmium batteries required.

[–]neolithicera 0ポイント1ポイント  (0子コメント)

Thanks, this is what I wanted to know.

コメントをもっと表示する (1 返事)

    [–]AZwildcatsNTNexus 5 1ポイント2ポイント  (1子コメント)

    Every battery is eventually , going to lose capacity to charge. Thats just the technology we have today. When they degrade, it should not be that expensive to replace them. Ive seen Nexus 5 batteries go for $20

    [–]CaelrieNote 4 1ポイント2ポイント  (7子コメント)

    Who keeps a phone long enough for the battery to die anyway?

    [–]chriscosta77Note 4 - 5.0.2 TW Rooted Stock, Nexus 7 FHD - Rooted Stock, 5.1[S] -3ポイント-2ポイント  (6子コメント)

    I suppose that culturally, that's a very good question. Why keep any device longer than it takes for the next iteration to come out?

    Of course, I suppose smartphone companies are banking on technolust to keep us cycling devices fast enough to make battery longevity a non-issue.

    And I'm beginning to think most people either don't understand enough to care, or they just don't care. Or even if they understand it, don't care anyway because they're just going to buy another device before it even becomes an issue.

    [–]CaelrieNote 4 2ポイント3ポイント  (5子コメント)

    I suppose that culturally, that's a very good question. Why keep any device longer than it takes for the next iteration to come out?

    It takes longer than 1 year for your battery to go bad, though. It takes 2-4 years, depending on how heavy a user you are.

    Who keeps a phone for 3 years, and why?

    [–]chriscosta77Note 4 - 5.0.2 TW Rooted Stock, Nexus 7 FHD - Rooted Stock, 5.1[S] -3ポイント-2ポイント  (4子コメント)

    Who keeps a phone for 3 years, and why?

    Who doesn't?

    So let us pretend that there is a valid reason you would need to upgrade your smartphone yearly.

    Let's knock off "degraded battery performance" and "network compatibility", because we are talking about devices released within the past year and a half. Let's assume we are on the same network.

    For example sake, what necessary functions is an LG G2, or Nexus 5, Sony Xperia Z1, or Samsung Galaxy S5 incapable of doing that a LG G4, Nexus 6, Sony Xperia Z3, or Samsung Galaxy S6 can do? I can bet there won't be a phone you'll need to upgrade to next year either.

    Nobody needs to upgrade every flagship release cycle. Get this, there's even people who don't want to!

    Benchmarks, pixel peeping, and new shiny are not reasons to need an upgrade.

    For those of us who don't see the need to upgrade, battery capacity degrading over time is a valid and important concern.

    [–]CaelrieNote 4 1ポイント2ポイント  (0子コメント)

    A 3 year old phone is laggy and slow, and usually can't run a new OS meaning it can't run lots of apps.

    [–]tnvol88 0ポイント1ポイント  (2子コメント)

    You're examples aren't all three years apart. The s5 to s6 is only one year. Three years ago the galaxy s3 was released. That's a very different phone than the s6.

    [–]chriscosta77Note 4 - 5.0.2 TW Rooted Stock, Nexus 7 FHD - Rooted Stock, 5.1[S] -2ポイント-1ポイント  (1子コメント)

    Do you think the S8 is going to be doing anything that the S5 cannot? I think we have reached a point where there aren't very many gains to be had. Each flagship will be evolutionary, rather than revolutionary.

    I know someone who is still using their iPhone 4s. Battery life is abysmal but it still works. Snapshots, a few apps like Facebook, a couple of games. The phone still texts fine, and calls sound great.

    I see posts from people still rocking the Nexus 4, or the Note 2. Sometimes devices even older. They are still viable for what those people use it for.

    I've still got a Panasonic CD player I bought new in 1997. Anti-skip, bass boost, FM Radio, EQ. Even plays MP3 disks. Guess what, I recently went looking for a new CD player for a friend of mine. The fucking things aren't any better than they were 18 years ago (if anything, they're built flimsier now) The technology peaked a long time ago.

    I think smartphones are heading to the same sort of peak. After we move to entirely 64-bit operating systems, what will be left?

    [–]CaelrieNote 4 0ポイント1ポイント  (0子コメント)

    Do you think the S8 is going to be doing anything that the S5 cannot?

    Absolutely. For example, the s2 to the s5 (3 years) introduced 5ghz and AC wifi, LTE, HDR, selective focus, download booster, fingerprint sensor, etc. It did a LOT the s2 couldn't.

    [–]SACHDNexus 5/Chroma Rom 5.1.1 1ポイント2ポイント  (17子コメント)

    Thanks for this, I have a feeling that I played some role in this whole debate over battery degradation from quick charging.

    I had to ask though, what's wrong with getting the phone battery below 20%?

    And is there any evidence to support the fact that your battery works best if you don't let it fall below 40% and never let it get up to 100%, or is that also a myth?

    [–]nybreath 0ポイント1ポイント  (0子コメント)

    There is no problem in getting your phone below 20%. What you can read on battery university is that is preferable to not STORE full or close to full battery, or depleted or close to depleted battery.
    If you are going to not use the batter for a couple months it is better to charge it to around 80% first, that is it.
    This is caused by the facts that Li On don't like to be close to full voltage (full charged) and don't like to be close to 0 voltage (full depleted. But this doesn't matter if you are in that state temporarily.

    [–]EnddaAndroidExplained.com -2ポイント-1ポイント  (15子コメント)

    The idea is that you never want to let your phone get into extremes. Meaning, extremely full, extremely low, extremely hot, extremely cold

    Will your phone lose 50% capacity over two years if you let it drop below 20% every day? No. But technically it will lose more capacity if you do this than if you do the 40% to 80% rule

    http://lifehacker.com/5875162/how-often-should-i-charge-my-gadgets-battery-to-prolong-its-lifespan

    Talks about that rule, which cites Battery University's testing. The real question is though, how much capacity will it lose(when dropping below 40/20 or charging it full) and that hasn't been quantified because of how many variables there are.

    It could be less than 5% extra each year, which for most people who upgrade every 2 years isn't that big of a deal. For people who keep their phone for 5+ years, or buy used phones though, that could be huge

    [–]Droid2WinHTC One M8 3ポイント4ポイント  (14子コメント)

    My understanding (and I'm not a battery wizard here, so someone who really does know this please chime in if I'm wrong) is that there's a part of your phone's software (I believe called the PMIC) that regulates the rate of battery charging. The "0%" indicator in your battery display isn't actually 0%, there's a buffer of additional charge below that. Same thing with the "100%" indicator, with more charging space above it. This is regulated to prevent the user from degrading the battery by over-charging or over-discharging. So we really don't have to worry about that.

    Again, though, someone with a background in battery tech, please chime in if I'm wrong. Source: another thread on this subreddit featuring this never-ending fierce debate over preserving battery life.

    [–]SACHDNexus 5/Chroma Rom 5.1.1 3ポイント4ポイント  (0子コメント)

    While I appreciate reddit.com/u/Endda explanation, this is what I've heard too.

    According to a friend of mine the 0% and 100% on your phone aren't accurate descriptions of how much juice is really left in the battery but the percentage of juice your manufacturer deemed safe for the phone to charge to and discharge to.

    [–]EnddaAndroidExplained.com 0ポイント1ポイント  (0子コメント)

    You are right. The 0% and 100% that get registered by your phone's battery percentage indicator isn't technically 0 or 100 percent

    This doesn't completely prevent degradation from the full to empty charge cycle. It minimizes it, but it doesn't reduce it completely. This is where the 40/80 'rule' came into play as it minimizes it even more

    Nothing we can do, besides not using our phones completely, will prevent degradation and even then time will degrade the battery's capacity. But there are ways that we can reduce it as much as possible.

    But as I mentioned, this amount of degradation might not mean much to the 'average' user. By average, I mean the one who upgrades their phone every couple of years. This could add up to a lot(25% to 50%) for the frugal user who keeps their phone for 4+ years

    [–]Ovil101S3 CM12.1, S6 stock rom rooted 1ポイント2ポイント  (23子コメント)

    So, with the S6, there is no option to turn off the quick charge feature. Is there any other way to prevent quick charging?

    [–]STICK_OF_DOOMSamsung Galaxy Avant, N7 2013 TCR 7ポイント8ポイント  (21子コメント)

    Use a "slower" charger.

    [–]Ovil101S3 CM12.1, S6 stock rom rooted 3ポイント4ポイント  (20子コメント)

    So would the charger from my S3 be safe to use?

    [–]RAIKANABroken SPH-L710 3ポイント4ポイント  (10子コメント)

    Yes. You can also use the s6 charger and disable it in the battery settings

    [–]Ovil101S3 CM12.1, S6 stock rom rooted 0ポイント1ポイント  (9子コメント)

    There is no setting for that in the battery settings. A Google search showed that that is a thing for the note 4.

    [–]joker47manGalaxy Note 4, FireKatN4 0ポイント1ポイント  (8子コメント)

    Probably because the Note 4 battery can be replaces with an extended battery which would not properly charge if the Adaptive Fast Charging was enabled

    [–]CassiuzMod | Note 4 0ポイント1ポイント  (7子コメント)

    I've used a third party battery (a good quality one from Anker though, nothing scary!) with fast charging enabled on my Note 4. If the battery doesn't support it, it seems that it just charges at a standard rate (2 Amps at 5 Volts in this case).

    [–]joker47manGalaxy Note 4, FireKatN4 0ポイント1ポイント  (6子コメント)

    It won't fully charge the batteries that are more than the stock battery capacity because QC 2.0 is controlled by the kernel and is based off the stock battery capacity.

    [–]reductaseGalaxy S6 | VZW -1ポイント0ポイント  (5子コメント)

    The charge progress of a battery is determined by voltage, not how many coloumbs of charge go into it. Larger batteries will be fully charged, they just take longer to get there.

    [–]joker47manGalaxy Note 4, FireKatN4 1ポイント2ポイント  (4子コメント)

    Not how the Note 4 handles it. I have the ZL 10000mAh battery and it does not actually charge all the way when the phone says 100%. It will sit at 100 and still say charging so the problem lies in how the device determines when it is fully charged

    [–]STICK_OF_DOOMSamsung Galaxy Avant, N7 2013 TCR 1ポイント2ポイント  (0子コメント)

    I think so.

    [–]fly3rs18Verizon GS5 0ポイント1ポイント  (7子コメント)

    Check the specs on the charger. "Speed" that people refer to is the current (when comparing two chargers of equal voltage, aka 5V). For a "slow" charger you probably want 1A (5W is the same)

    [–]Ovil101S3 CM12.1, S6 stock rom rooted 0ポイント1ポイント  (6子コメント)

    Will do.

    [–]fly3rs18Verizon GS5 0ポイント1ポイント  (5子コメント)

    Actually I am slightly off. I didn't realize that quick charging is actually bumped up to 9V 1.67A instead of the typical USB 5V 1 or 2A.

    So "slow" charging would really be any 5V charger, either 1 or 2A. Depends on how slow you want. Your s3 charger is likely 5V 2A (10W), but I'd double check it.

    [–]reductaseGalaxy S6 | VZW -2ポイント-1ポイント  (4子コメント)

    You have to look at the charging wattage, not just the current. Going by your last comment that said speed is measured in amps, you'd expect the S6 adaptive fast charing (1.67A/9v) would be slower than the standard charge (2A/5v). There is so much misleading information in this thread and all over the internet about batteries, please don't contribute to the clusterfuck.

    [–]fly3rs18Verizon GS5 0ポイント1ポイント  (3子コメント)

    It is true that wattage is a simpler unit for quick reference of which is "faster". However I did not mean that somehow 1.67A (15W) was "slower" than the 2A (10W) typical chargers.

    If you think I'm wrong then correct me and explain it, don't just say "you're wrong, stop posting". It doesn't add anything positive to this "clusterfuck".

    [–]reductaseGalaxy S6 | VZW -1ポイント0ポイント  (2子コメント)

    I did explain it; I said that wattage, not amperage, is the correct way to determine which charger is faster. It was literally the first thing I said. I know you didn't mean that 15w was slower than 10w, but by your explanation, amperage is what matters. This could confuse people into believing that using a 2A/5v charger would charge their phone faster than a 1.67A/9V charger. I don't doubt that you know what you're talking about, but your explanation could lead to others improperly understanding the electrical concepts.

    [–]fly3rs18Verizon GS5 0ポイント1ポイント  (1子コメント)

    If you only read the first sentence of the first post then maybe you could be confused by it. However if you read the whole thing then it is pretty clear. I specifically mention how 5v/2A is not "fast" charging. I don't see how that was unclear.

    So "slow" charging would really be any 5V charger, either 1 or 2A.

    [–]reductaseGalaxy S6 | VZW 3ポイント4ポイント  (0子コメント)

    There is no issue with using the fast charger unless you plan on keeping your phone for 5+ years. Yes, quick charging reduces the life of your battery, but chances are you're never going to see that effect anyways. It's laughable that people think they know more than the engineering team behind the modern marvel that is smartphones.

    [–]anku255Micromax A77, 4.2.2, Rooted 0ポイント1ポイント  (2子コメント)

    In summer my phone gets very hot while charging. What to do then? Remove the charger and charge again after it gets cooler ? Or leave it as it is ?

    And I would like to know, can I keep my phone on an ice cube (with back cover on) to cool it? Will it harm my phone or battery?

    [–]404redditornotfoundHTC Sensation XE 128GB 1ポイント2ポイント  (0子コメント)

    don't put it in direct sunlight, use a lower amp charger, put it on a metal plate or something that can dissipate heat, use a little fan to cool it while charging...

    i wouldn't expose it to ice or water though since there's always the risk of water getting into the device if something goes wrong.

    [–]EnddaAndroidExplained.com 1ポイント2ポイント  (0子コメント)

    You should do the on/off charging if you want to prevent it from deteriorating as much as possible but no, you shouldn't put an ice cube on it to cool it(condensation and all)

    [–]PurpletechLG G2 (D800) 1ポイント2ポイント  (3子コメント)

    Just to make a comment on the e-cig batts:

    I've been charging my 25R's at 2.5A-3.5A (1C or higher) for approximately 4 months that I've had them and had zero issues with them.

    [–]reductaseGalaxy S6 | VZW 0ポイント1ポイント  (2子コメント)

    Those cells have a completely different chemistry than the Li-poly cells in smartphones.

    [–]Butterd_Toost 0ポイント1ポイント  (1子コメント)

    I don't know why you are being down voted..you're right. As a PV user I have lots of up close experience with 18650's and soon lipo's. They are different beasts as far as tech is involved.

    [–]reductaseGalaxy S6 | VZW -1ポイント0ポイント  (0子コメント)

    I got mass downvoted by OP because I called him out on his bullshit and he went back and downvoted every one of my posts for the last month or so.

    [–]zebrastripe665 0ポイント1ポイント  (0子コメント)

    Does anyone have any good info on whether or not wireless charging is harmful to batteries (as opposed to standard USB charging)? I had been using it with my Turbo for a while with no issue, but one night it made my phone freakishly, almost dangerously hot (I know it probably damaged my battery, idk if this was caused by me knocking the phone into a bad position one night). Even without the temperature scare, I've still been a bit reluctant to use it though.

    [–]vdot88 0ポイント1ポイント  (0子コメント)

    what part of this applies (or doesn't apply) to Li-Po batteries?

    [–]AndrewFlashDroid Razr HD 0ポイント1ポイント  (3子コメント)

    Question since you seem like a battery guru: Is it okay to leave my phone on the charger all night, when it's down to like 20%? Does leaving it on the charger so long (8 hours a night) pose any risk to its integrity.

    [–]LazerstrikeNOTE 4, rooted and stuff -1ポイント0ポイント  (0子コメント)

    I disagree. High cell voltages stress the battery and will cause premature wear. If you must charge to 100%, then do so and unplug the device as soon as you can. The battery wont over charge, its OK to do it from a safety standpoint(although i don't recommended it personally). Think of it like a car. Your engine has a rev limiter to keep it from spinning its self to death(ie overcharging your battery). Leaving your phone plugged in is like letting your engine bounce off the rev limiter for hours on end. Eventually it will cause premature wear.

    [–]quicksilver101XDA Portal Writer 0ポイント1ポイント  (2子コメント)

    What variations to this would be necessary for Li-Po batteries (like the one in OnePlus One)?

    [–]CassiuzMod | Note 4 0ポイント1ポイント  (0子コメント)

    None, for all user purposes they work exactly the same.

    [–]reductaseGalaxy S6 | VZW -2ポイント-1ポイント  (0子コメント)

    All modern smartphones use LiPo batteries.

    [–]Erigisar 0ポイント1ポイント  (2子コメント)

    Hello, I am using the lg g4, and will be getting an extra battery to go with it. You said to keep the battery away from keys and coins, etc. Is it safe to be kept in my wallet? In one of the card slots?

    [–]chriscosta77Note 4 - 5.0.2 TW Rooted Stock, Nexus 7 FHD - Rooted Stock, 5.1[S] -4ポイント-3ポイント  (1子コメント)

    As long as it's not going to be bent, or sat on, should be ok.

    [–]TODO_getLifeDeveloper - M-Dev Apps 0ポイント1ポイント  (2子コメント)

    How are we supposed to prevent quick charging when most new phones come with quick chargers now? Charge via a laptop and let it take twice as long.

    [–]waxox 1ポイント2ポイント  (0子コメント)

    You don't. Are you seriously going to avoid a hugely useful feature of your phone because some internet guy told you it's bad? Wtf happened to critical thinking. The engineers who designed the thing might have a bit more credibility, and they designed it to work with the charger it came with.

    [–]chriscosta77Note 4 - 5.0.2 TW Rooted Stock, Nexus 7 FHD - Rooted Stock, 5.1[S] -4ポイント-3ポイント  (0子コメント)

    I would never suggest charging from a laptop USB unless it was necessary. Most smartphone manufacturers have OEM chargers for sale that are standard chargers.

    [–]AZwildcatsNTNexus 5 0ポイント1ポイント  (0子コメント)

    Every battery is eventually , going to lose capacity to charge. Thats just the technology we have today. When they degrade, it should not be that expensive to replace them. Ive seen Nexus 5 batteries go for $20

    [–]justaguess 0ポイント1ポイント  (0子コメント)

    Do degassing Li-ion batteries have an odor? I'm only asking because overcharged lead-acid car batteries can smell like sulfur/rotten eggs (actually, hydrogen sulfide).

    [–]gauz47Nexus 6 0ポイント1ポイント  (1子コメント)

    How safe is using a charger which is under-rated than the Nexus 6 Q2.0 charger? Is a 2A charger fine for the N6?

    [–]chriscosta77Note 4 - 5.0.2 TW Rooted Stock, Nexus 7 FHD - Rooted Stock, 5.1[S] -4ポイント-3ポイント  (0子コメント)

    Yes, its fine.

    [–]timrichardson 0ポイント1ポイント  (0子コメント)

    Wireless charging is not fast but battery gets hot.

    [–]getonmyhype 0ポイント1ポイント  (0子コメント)

    Good thing I got a note 4 then. Good part learned some stuff about safety always good to know

    [–]holic_2 0ポイント1ポイント  (0子コメント)

    I also feel like these companies need to put bigger batteries in them too

    [–]Echelon64Samsung GS5 Ting/Movistar 0ポイント1ポイント  (0子コメント)

    Removable battery checking in, enjoy taking a heat gun to your phone S6 plebs.

    [–]truthsmcgee -1ポイント0ポイント  (2子コメント)

    Quit bitching bitch

    [–]rroma002Samsung Galaxy S6 Edge 1ポイント2ポイント  (0子コメント)

    Haha, this gave me a chuckle.

    [–]LazerstrikeNOTE 4, rooted and stuff 0ポイント1ポイント  (6子コメント)

    OP - everything was correct except one part. It's far from ideal to charge your device to 100% and unplug it. Ideally you wouldn't even charge to 100% in the first place. Only charging your device to 90% doubles the service life of the cell, 80% quadruples it, 70% octuplets it. Gains are extremely significant which is why most electric car batteries are limited to ~3.9v cell voltage or 70% of total capacity. That's part of how they get so many charge cycles out of them. Military long-life li-ions specs call for a charging cutoff of 3.72v or just over 70% charge. I keep my Note 4 between 30-80% and charge typically using a 850ma power supply. 

    On another note, wireless charging can also be bad due to the excessive heat produced by the coil and its position which is typically right on top of the cells themselves.

    [–]reductaseGalaxy S6 | VZW 0ポイント1ポイント  (2子コメント)

    It's far from ideal to charge your device to 100% and unplug it.

    Honestly, how long do you plan on keeping your batteries? You're losing more capacity only charging to 90% than you would charging it to 100% and suffering the loss in capacity over time. Just use it as the manufacturer intends and you'll be fine over the lifespan of the phone. The only time I could see undercharging being useful in a smartphone is if you're running through multiple cycles in a day. Comparing smartphone batteries to electric car batteries doesn't make any sense. Different chemistry, massively different usage pattern, different lifespan.

    [–]LazerstrikeNOTE 4, rooted and stuff 2ポイント3ポイント  (1子コメント)

    The purpose is that I have as much capacity as possible for when I really need it. Say a year down the line and 400 cycles later I need every last drop to last me through a camping trip or emergency, I will have a battery which is still in excellent condition and capable of near first day performance. Is it necessary? No! Am I a geek who likes squeezing evey bit of performance out of his device? Yup.

    Also electric car batteries are very comparable. While they use a slightly different li-ion chemistry which trades energy density for service life they still behave in the same exact way when it comes to charging and care.

    [–]reductaseGalaxy S6 | VZW -1ポイント0ポイント  (0子コメント)

    The purpose is that I have as much capacity as possible for when I really need it.

    I understand this totally. However, you're sacrificing 10% of your battery capacity daily for maybe 10% when you "really need it". I'd rather have the insurance of having that 10% daily for random occurrences I cannot predict; for times I can predict, like camping, I can just take a $10 USB battery charger and get another full cycle. If you're going to be away from AC for a long time and need battery, just get one. That 5-10% extra you are saving isn't going to hold you over. You're still losing capacity when your phone gets hot, and you're losing capacity over time simply by having it charged whatsoever. It's not like undercharging keeps your battery at 100%, you just lose 10% instead of 20% capacity.

    Also electric car batteries are very comparable.

    Yep, just like lawnmower engines and top fuel dragster engines are comparable because they're both internal combustion engines. Electric car batteries run through multiple cycles a day, are under heavy current draw, and are expected to last far longer than the two year cell phone cycle. Electric car batteries are undercharged because they need to get multiple years of life out of them; consumers don't want to drop thousands of dollars on a new battery pack every two years. A brand new battery in my SGS6 costs $45. I'll take fast charging to capacity, discharging to 0%, using the phone in hot conditions, and if I need to, I'll pay the cost of a video game to get 100% performance, something that even undercharging cannot provide.

    [–]slinky317Moto X 2013 0ポイント1ポイント  (0子コメント)

    Except when your phone hits 100%, the battery's not really at 100%. It intentionally downplays it so you don't fully maximize your battery.

    In the end, just use your phone. You'll probably get a new one before the battery issues come into play anyway.

    [–]LeSinner 0ポイント1ポイント  (1子コメント)

    I recently burned out my nexus 6 battery and had to get a new one cause it was only lasting exactly 6 hours on charge. Changed it really quick and easy and now I have the same battery life as a few months ago. I upgraded often enough to not care but I love my nexus 6 so a battery change was the cheapest way to go

    [–]Pokeh321Previous: HTC One M8;Current iPhone 6+ 0ポイント1ポイント  (0子コメント)

    My brother got a Note 4 and for the first 3-4 months (can't remember exactly) all he did was quick charge. Got to a point where his battery was complete shit.

    We still aren't sure whether it was him just quick charging the whole time or the battery was just a dud. Either way he won't touch quick charge anymore.

    [–]Freddit- 0ポイント1ポイント  (1子コメント)

    TL;DR using stuff wears stuff out.

    Additionally, natural wear and tear of the heart is the number one cause of heart failure. Solution: Stop the heart now before it wears itself out.

    [–]Remmes- 1ポイント2ポイント  (0子コメント)

    TL:DR you can increase the speed of the natural wear and tear..

    Additionally, being obese increases the chance of a heart attack. Solution: Exercise and eat healthy portions.

    Fast charging increases the amount of natural wear and tear, if you charge your phone at night you may as well "slow" charge it.

    [–]plexistar31 -1ポイント0ポイント  (0子コメント)

    So that explains the moto X battery. Lol

    [–]AeroV8Red -1ポイント0ポイント  (0子コメント)

    Wow

    [–]shane2811 -5ポイント-4ポイント  (2子コメント)

    Honestly.... Who the hell cant change the battery in this phone.... Have you never taken anything apart?!

    [–]Flame_ChokeNote 4 - FireKatN4, Desire 816 - CM 12.1 unofficial 5ポイント6ポイント  (1子コメント)

    He's not speaking just for the Note 4 though. It's any phone that supports QC. And as far as I'm concern, quite a few QC phones don't have the option to change the battery.

    [–]shane2811 -2ポイント-1ポイント  (0子コメント)

    Even when it comes to the nexus 6. Just take a few things off and change the battery.