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Donut Lab's Battery Claims Reportedly Subject of Whistleblower Complaint

The complaint alleges Donut Lab overstated battery performance and production readiness, while the company and Nordic Nano deny misleading investors.

Summary by Engadget
Startup Donut Lab made a splash at the start of the year with some astonishing — and suspicious — claims about its solid state batteries. Now Finnish newspaper Helsingin Sanomat reports an individual has filed a criminal whistleblower complaint against the company over those claims. Until recently, Lauri Peltola was listed as the Chief Commercial Officer at Nordic Nano — the firm reportedly contracted to handle portions of the manufacturing on D…

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The key promises made by Donut Lab, which is marketing the miracle battery, are not true, says Lauri Peltola, the director of the partner. He has filed a criminal complaint against Donut Lab. According to Donut Lab CEO Marko Lehtimäki, the promises about the battery are true.

·Helsinki, Finland
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An internal source of Donut Lab's manufacturing partner filed a criminal complaint in Finland against the startup, accusing it of having deceived the public about the performance of its semiconductor battery. The company denies any fraudulent behaviour.

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Helsingin Sanomat broke the news in Helsinki, Finland on Friday, April 17, 2026.
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