SMRTR Science & EngineeringJan 18, 2026Interesting Engineering

Chinese firm’s 620-mile solid-state EV battery retains 72% capacity even at -22°F

SMRTR summary

Chinese automaker Dongfeng is testing solid-state EV batteries with 620-mile range capability at extreme cold-weather facilities near China's northern border. The 350 Wh/kg batteries retain 72% capacity at -22°F and passed safety tests at 338°F, with mass production planned for September 2026.

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