Donut Lab’s Battery Barely Holds Charge, Still Couldn’t Start a Fire
KEY POINTS
- •Donut Lab has been testing its solid-state battery with Finland's state-owned VTT Technical Research Centre.
- •Previous tests included speed charging, extreme heat causing loss of the vacuum seal, and disproving it was a supercapacitor.
- •In the latest damage test, the battery barely held a charge but notably did not catch fire, which Donut Lab claims as progress.
Donut Lab, a company determined to convince everyone their solid-state battery is legit, invited Finland’s state-owned VTT Technical Research Centre back for another rom-com of scientific tests. After torturing their battery with speed charging, heat that could give the sun performance anxiety, and denying it was a supercapacitor, this month’s grand finale was the 'damage test.' Spoiler: the battery limped along on a mercy charge and refused to flambé. Previously, the pouch lost its vacuum seal during heat tests—think of it like a sad balloon that never quite popped but definitely lost its mojo. No fire, slight charge, huge scientific shrug, and a victory lap for not incinerating anything.
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(1 of 3)Donut Lab's battery can barely hold a charge but at least it kept its cool and didn’t try to incinerate the planet. Slow-rolling tech apocalypse 2026 edition.
This battery’s idea of surviving damage is just... not spontaneous combustion. Aim low, win big.
Donut Lab’s solid-state battery performs like my motivation on Mondays: surviving injury but basically useless.
Source: Theverge | Published: 3/23/2026 | Author: Andrew J. Hawkins
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