Donut Lab's Solid-State Battery Claim Questioned

An Intertek lab in the UK found only 3.4 ppm lithium and 632 ppm sodium in a sample of Donut Lab's solid-state battery, which the Finnish startup says proves it is neither lithium-ion nor sodium-ion. But the report measured just two elements on a cell Donut Lab disassembled itself, and nine months after CES there is still no production vehicle using the battery.