Donut Lab has released its third independent test report from VTT, the Finnish Technical Research Centre, and it confirms another claim: the solid-state battery retains 97.7% of its charged capacity after sitting idle for 10 days.
The new report (VTT-CR-00125-26) adds self-discharge performance to the growing list of independently verified specs — but three reports in, the two most extraordinary claims remain completely untested.
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