Electric Vehicle Manufacturer
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Claims TS Pro is world's first commercially delivered vehicle with solid-state battery; delivery slipped past March 31, 2026 deadline; spec claims disputed by Finnish criminal complaint
A June 2026 investigation backed by more than 20 independent battery experts concluded that Donut Lab's claimed solid-state battery is a conventional lithium-ion cell. Voltage curves at 3.7–3.8V at 50% state of charge and graphite anode expansion signatures matched NMC lithium-ion chemistry — not the sodium-ion solid-state design Donut Lab announced at CES.
Updated Aug 1
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