solid state battery

Donut Lab touts Intertek test on 'solid-state' battery, but experts question the evidence

A UK Intertek lab found only 3.4 ppm lithium and 632 ppm sodium in a sample of Donut Lab's claimed solid-state battery, which the Finnish startup says proves it is neither lithium-ion nor sodium-ion. However, the test measured only two elements on a cell Donut Lab disassembled itself, leaving the actual chemistry unverified nine months after CES.