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Donut Lab's solid-state battery endured damage testing, failing to ignite but losing 55% of its charge capacity and experiencing a 17% thickness increase. The company highlights its "graceful failure" safety, yet independent verification for key claims like 100,000 cycles and 400 Wh/kg energy density remains absent.
Finnish startup Donut Lab has released the first independent test results for its production-ready, solid-state battery. Conducted by the state-owned VTT Technical Research Centre of Finland, the evaluation focused on charging speed and the battery's thermal behavior. This disclosure aims to address skepticism surrounding Donut Lab's claims of a major battery breakthrough.
