
Developed by Donut Lab of Finland, the commercial-grade solid-state power battery was independently tested and verified by VTT Technical Research Centre of Finland in September 2026, achieving a gravimetric energy density of 409Wh/kg and a volumetric energy density of 805Wh/L at the cell level — the highest energy density among all publicly tested commercial solid-state batteries to date. It supports 11C fast charging, reaching 80% state of charge from 0% in just 4.5 minutes, while maintaining stable performance at -30°C low temperatures and delivering long cycle life. This device has been officially listed by LAWRENCE WORLD RECORDS CERTIFICATION as the “Highest Energy Density Commercial-Grade Solid-State Power Battery”.