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939 Donut Lab's 'Solid-State' Battery Exposed As Regular Li-Ion

Slashdot
BeauHD @ Slashdot · 06/09/2026 03:00 EDT

Donut Lab's 'Solid-State' Battery Exposed As Regular Li-Ion

A battery researcher's investigation, backed by more than 20 independent experts, claims Donut Lab's much-hyped "solid-state" battery is actually a conventional lithium-ion cell, with voltage curves and expansion data matching high-nickel NCM chemistry rather than the promised sodium-ion solid-state design. Electrek reports the company raised about $25 million from more than 1,300 mostly small investors on claims of 400 Wh/kg energy density, 100,000-cycle life, and 5-minute charging that now appear unsuppor

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