Technology

Donut Lab says latest test proves its solid-state battery isn’t a supercapacitor.

Donut Lab says a new independent test confirms that its solid-state battery is not a supercapacitor as some have theorized.

AAndrew J. HawkinsMarch 9, 2026

Donut Lab says latest test proves its solid-state battery isn’t a supercapacitor.

<ul><li></li><li></li><li></li></ul> There was speculation that Donut Labs battery was able to discharge energy so quickly because it was a supercapacitor in disguise. So the startup set out to disp…

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