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Sep 2, 2026, 8:46 am106 ptsTrending
Electrek
Donut Lab has published a new independent test claiming its battery reached an energy density of 409 Wh/kg and 805 Wh/L, the first energy-density figure the company has put on record after months of scrutiny. But the number lands against a promise the company has already broken: that this “solid-state” cell…
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