Lead Story
Oct 23, 2026
Donut Lab's Solid-State EV Battery Passes -30°C Cold-Weather Test, Backed by VTT Reports
Finnish startup Donut Lab says its solid-state EV battery has passed an independent extreme cold-weather test at -30 degrees Celsius, following earlier VTT-validated results at 100°C. The company is publishing detailed third-party reports to counter skeptics and back its claims of five-minute charging and 400 Wh/kg energy density.
Priya Sharma