Finnish startup Donut Lab announced it will release independent test data supporting its all-solid-state battery after facing criticism at the 2026 Consumer Electronics Show in Las Vegas.
The company stated initial results will be published beginning February 23, through a video series designed to address industry doubts.
Donut Lab claims its battery has already been independently tested by VTT Technical Research Centre of Finland. According to the company, detailed findings will be shared on a dedicated website, idonutbelieve.com, built specifically to respond to critics.
The startup says it wants to move the debate from speculation to measurable proof.
“We are making this series to put measurable evidence in public view so people can separate what’s asserted from what’s verified,” Donut Lab CEO Marko Lehtimaki said in a YouTube video released Friday. “It’s a mind-blowingly big breakthrough that we’re bringing to the market,” he added.
The move comes after weeks of skepticism from established battery manufacturers and industry analysts. At CES, Donut Lab presented bold specifications but did not provide live demonstrations, patent disclosures, or peer-reviewed research. That absence fueled backlash across the sector.
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