A dark, dramatic spotlight highlights a central chat message box, surrounded by blurred, floating chat bubbles with various skeptical and sarcastic comments. The background is black and the mood is mysterious and critical.

A dark, futuristic object is partially visible against a black background, with negative comments about credibility and skepticism floating above it in grey speech bubbles.

A dark, blurred image of a tech device with overlaying blurred chat messages, including phrases like "Why are you guys lying?", "Where is the battery?", "Vapor ware king," and "Why does this sound too good to be true.

White text on a light background reads "DONUT" with a red circular outline and a lightning bolt inside the "O." The word "BELIEVE" is faintly visible below.

Fair enough. Here you go.

Third Party Testing

This website serves as the platform for publishing validation results and technical documentation related to the Donut Solid State Battery. Donut Lab has commissioned the internationally renowned VTT Technical Research Centre of Finland to conduct independent measurements of the battery’s performance and key characteristics. Unless otherwise stated, all tests presented here have been conducted by VTT. Full reports will be published alongside detailed video documentation that walks through the procedures, showcases the test setups, and explains the results.

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Introducing “I Donut Believe”

Donut Lab has commissioned internationally respected VTT Technical Research Centre of Finland to independently measure the performance and characteristics of its solid-state battery. Through third-party testing under controlled research conditions, Donut Lab provides verified data to support its performance claims. In the video, CEO Marko Lehtimäki explains the company’s perspective and the rationale for launching the series and publishing the results in this format.

Watch the launch video

First test result goes live in:

Explore the Battery