Donut Lab’s ‘miracle’ solid-state battery confirms 0-80% charge in 4.5 min — but there’s a catch

Donut Lab has released the first independent test results for its controversial solid-state battery, and the data confirms at least one headline claim: the cell charged from 0 to 80% in just 4.5 minutes at an extreme 11C rate.

It doesn’t blow up, but it gets pretty damn hot.

The results come from Finland’s state-owned VTT Technical Research Centre, one of Europe’s leading research organizations. But the report only covers charging performance — leaving Donut Lab’s most extraordinary claims completely unverified.

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