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Donut Lab's Battery Charges 0-80% in 4.5 Minutes

2/23/2026

Summary

Story summary

Donut Lab released independent test results showing its solid-state battery can charge from 0 to 80% in 4.5 minutes at an 11C rate.
VTT Technical Research Centre conducted the tests, and the battery reached a peak temperature of 90°C during charging, indicating a need for thermal management.
Despite the fast charge, energy density (400 Wh/kg) and cycle life (100,000 cycles) remain unverified, and dendrite formation is not addressed; further results are expected.

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Story summary

Donut Lab released independent test results showing its solid-state battery can charge from 0 to 80% in 4.5 minutes at an 11C rate.
VTT Technical Research Centre conducted the tests, and the battery reached a peak temperature of 90°C during charging, indicating a need for thermal management.
Despite the fast charge, energy density (400 Wh/kg) and cycle life (100,000 cycles) remain unverified, and dendrite formation is not addressed; further results are expected.