Donut Lab’s announcement of a production-ready solid-state battery with 400 Wh/kg energy density and 100,000-cycle life has sparked excitement, confusion, and skepticism in the battery community. While major manufacturers like CATL and BYD target 2027 for small-scale production, this small Finnish company claims Verge Motorcycles will deliver vehicles with their batteries in Q1 2026. The extraordinary claims come without independent verification, setting up an imminent test of credibility.