Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density 6 months ago
Lehtimaki even serves as a board member at Nordic Nano, but says that’s not the source of this product. “It’s not from them,” he says.
- [Is this the world’s first solid-state battery? - The Verge](https://www.theverge.com/transportation/858514/is-this-the-w...)