Donut Lab's third independent VTT test confirms its solid-state battery retains 97.7% capacity after 240 hours idle. Energy density and cycle life remain untested.

Donut Lab solid-state battery retest by Finland’s VTT shows capacity rising to 110% at 80C, but weight data is still missing.

The startup's third test evaluates whether its solid-state battery is actually a supercapacitor. Here's what the results say.

VTT's second independent test shows Donut Lab's solid-state cell delivered 110% capacity at 80°C and survived 100°C discharge ...

The Finnish firm claims it has beaten the world’s largest carmakers and battery giants to commercializing solid-state cells ...

Lithium-ion batteries with liquid electrolytes are more susceptible to extreme heat. If a liquid battery gets too hot, the liquid can vaporize and catch fire — a process called thermal runaway. And at ...

Car batteries fail without warning from the visible signs most drivers recognize. The internal chemical degradation that causes failure is invisible from the outside until the battery can no longer ...

Finnish startup Donut Lab has just released the third independent test of its solid-state ...