Donut Lab solid-state battery: 5 independent tests in, still no energy density or cycle life data

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Donut Lab solid-state battery: 5 independent tests in, still no energy density or cycle life data

Donut Lab has now released five independent test reports from Finland’s VTT Technical Research Centre on its solid-state battery — and not a single one addresses the two claims that actually matter: the 400 Wh/kg energy density and the 100,000-cycle life.

The Q1 2026 deadline that Donut Lab set for delivering production batteries inside Verge Motorcycles is eight days away. The latest report, a cycling test dated March 13, adds another data point — but the overall picture remains unchanged.

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