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 battery validation adds a 10-day room-temperature retention figure of 97.7%, while energy density and weight data remain absent.

ION Storage Systems becomes the first U.S. solid-state battery company to pass customer cell performance qualification.

Basically, VTT hooked up Donut Lab’s to a battery tester and left it idle for 10 days, while measuring the voltage every 10 seconds. According to the results, the cell demonstrated high stability, ...

Cells will start production at its Maryland facility with expected expansion as production ramps BELTSVILLE, Md., March 10, 2026 /PRNewswire/ -- ION Storage Systems, Inc. (ION) announced today the ...

Donut Lab, a California-based startup developing solid-state battery technology, has drawn intense attention and sharp criticism over claims that its donut-shaped cells can outperform conventional ...

The Donut Lab solid-state battery was heated to the boiling point of water. Here’s what happened next.

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

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

Toyota Motor North America, Ann Arbor, Michigan, has entered a cooperative research and development agreement (CRADA) with the U.S. Department of Energy's Argonne National Laboratory to investigate ...