Donut Lab battery hits 80% in 4.5 minutes amid ‘scam’ claims
Interesting Engineering • • business
Key Points:
- Finland-based startup Donut Lab has released independent test results from VTT Technical Research Centre confirming its solid-state battery can charge ultra-fast, addressing previous industry skepticism.
- Tests showed the battery reached 80% charge in about 9.5 minutes at 5C rate and in 4.5 minutes at 11C rate, with full charges occurring in just over 12 and 7 minutes respectively, retaining nearly all stored energy after discharge.
- Unlike many solid-state designs, Donut Lab's battery performed under extreme conditions without active cooling or compressive force, relying instead on passive cooling and a simpler structural design.
- The company's CTO highlighted that this simplicity could reduce complexity, weight, and cost in electric vehicle battery packs, potentially influencing
