Startup DONUT LAB Unveils World’s First Mass-Producible All-Solid-State Battery—Key Details Remain Secret

At CES 2026, startup DONUT LAB drew attention with its claim of unveiling the "world's first mass-producible, vehicle-ready all-solid-state battery." The company stated that the battery achieves an energy density of 400 Wh/kg, supports ultra-fast charging in just five minutes, retains over 99% of its capacity across a temperature range from -30°C to above 100°C, and exhibits minimal degradation even after 100,000 charge-discharge cycles. However, when pressed by media on critical details—including materials composition, manufacturing processes, testing conditions, and cost/yield metrics—DONUT LAB consistently responded with "not disclosed at this time," only confirming that internal and third-party tests have been completed, though results remain unreleased. The company admitted its team is currently extremely busy and remains tight-lipped about core technical specifics.