Available today

World’s first all-solid-state battery in production vehicles
400 Wh/kg. Full charge in five minutes. Designed for 100,000 cycles. 
Lower cost than lithium ion.

100% green and abundant materials with global availability
No reliance on rare or geopolitically sensitive resources
Lower material cost than lithium-ion

No flammable liquid electrolytes
No thermal runaway chains
No metallic dendrites that can cause internal shorts
Safety is not added later. It is built into the chemistry, structure, and system behavior from the start.

Cold performance test
Validated for operation in extreme cold environments.

Tested at sub-zero temperatures, demonstrating stable output and minimal capacity loss under cold operating conditions. At −30 °C, Donut Battery retains over 99% of its capacity.

High-temperature test
Validated under sustained high-temperature operation.

Tested above 80 °C, maintaining stable operation without ignition or performance degradation. Even when heating the cell beyond 100 °C, capacity retention remains at over 99%, with no signs of ignition or degradation.