Samsung smartphones limit charging from a generic 5 V charger to 1.8 A, even if both charger and cable support much more.
When using a generic 5 volt 3 ampère charger (no Quick Charge or USB-PD standards), even recent Samsung smartphones limit charging to 1.8A, even if a 3 A or 5 A rated USB cable is used, regardless of whether the screen is turned on.
This limit has barely changed since at least 2013. Even an S4 charged at up to 1.7A if a high-quality cable was used and the screen was turned off.
Xiaomi smartphones and many power banks charge at 2.4 A from the exact same charger with the exact same cable that Samsung phones only draw 1.8A out of. And those 1.8A are not a technical limit, since Samsung smartphones can charge 9V 2.77A (25W models) or even 15V 3A (45W models). This means the charging hardware supports much stronger currents than 1.8 A, so there is no reason to limit generic 5 volt charging to 1.8 A.
Is there a way to force Samsung phones to charge faster from a generic 5 V adapter? Some API endpoint?
One way to override charging behaviour using root access is the
When using a generic 5 volt 3 ampère charger (no Quick Charge or USB-PD standards), even recent Samsung smartphones limit charging to 1.8A, even if a 3 A or 5 A rated USB cable is used, regardless of whether the screen is turned on.
This limit has barely changed since at least 2013. Even an S4 charged at up to 1.7A if a high-quality cable was used and the screen was turned off.
Xiaomi smartphones and many power banks charge at 2.4 A from the exact same charger with the exact same cable that Samsung phones only draw 1.8A out of. And those 1.8A are not a technical limit, since Samsung smartphones can charge 9V 2.77A (25W models) or even 15V 3A (45W models). This means the charging hardware supports much stronger currents than 1.8 A, so there is no reason to limit generic 5 volt charging to 1.8 A.
Is there a way to force Samsung phones to charge faster from a generic 5 V adapter? Some API endpoint?
One way to override charging behaviour using root access is the
siop_level file. Root users could use it to enforce fast charging when the screen is turned on back when Samsung throttled it (thankfully no longer). Does something like this exist for generic 5 volt charging?
