Donut Lab has published a new independent test claiming its battery reached an energy density of 409 Wh/kg and 805 Wh/L, the first energy-density figure the company has put on record after months of ...

In January, there was a lot of hype around an announcement from Finnish company Donut Lab: It claimed to have created the world’s first production-ready solid-state battery. But it now appears to be a ...

In January, a Finnish-Estonian startup proclaimed it had developed a truly solid state battery, a holy grail for the technology industry. Donut Lab's cell wasn't just solid state, however. It claimed ...

Donut Lab, a small Finnish startup claiming to have developed the first solid-state battery for electric vehicles, has released results from a new test aimed at addressing doubts about its technology.