Donut Lab, a Finnish solid-state battery maker, claims its cells retained 97.7% of their charge after sitting idle for 10 days, a figure that, if independently confirmed, would represent a sharp ...

The ever-changing properties during cell charging. The impact of wire-path resistance. Dealing with charger inefficiencies. When lithium-ion cell testers are being specified, the request is for a ...

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

As part of its 'I Donut Believe' campaign, Finnish battery developer Donut Lab has published further independent test results for its disputed solid-state ...

The Finnish startup’s pack can charge from 0 to 80 percent in under 5 minutes, according to its first independent test. The Finnish startup’s pack can charge from 0 to 80 percent in under 5 minutes, ...

Materials science ain’t easy. And it’s especially difficult when it comes to the batteries that power our smart home, wearable, and mobile devices; more specifically, lithium-ion (Li-ion) batteries.