Donut Lab promises proof of its claimed solid-state EV battery
Feb 23rd 2026
The Finnish startup says state research lab VTT has independently tested its pack and will publish results starting Monday, February 23, but experts remain skeptical after no hard evidence at CES.
- Donut Lab says VTT Technical Research Centre of Finland independently tested its all-solid-state EV battery and will release the data next week.
- The company claims the pack reaches 400 watt-hours per kilogram, charges in under 10 minutes, and endures about 100,000 cycles.
- Verge Motorcycles plans to install the battery in a production motorcycle in the first quarter, with limited deliveries delayed until later this year or next.
- At CES Donut Lab presented specifications without live demos, patents, or peer reviewed data, prompting sharp industry skepticism.
- CEO Marko Lehtimaki says the forthcoming data series and a new website called idonutbelieve.com are meant to separate assertions from verified measurements.
- Independent verification is still pending and major battery makers and experts say production-ready solid-state batteries remain unproven by most in the field.