Is the ‘Holy Grail of batteries’ finally ready to bless us with its presence?

image via The Verge

April 11, 2026, 11:00 AM

• •Donut Lab claims its solid-state battery can charge in five minutes and has an extended lifespan.
• •Experts are skeptical due to lack of proof and the complex nature of the technology.
• •Dendrite formation is a key challenge for solid-state batteries.
• •China is leading in solid-state battery development and mass production plans.

Finnish startup Donut Lab claims a solid-state battery breakthrough, but experts remain skeptical due to a lack of verifiable data. Despite posting independent test results, key metrics like chemistry, density, and cycle-life claims remain unsubstantiated. While the potential of solid-state batteries for faster charging and increased safety is significant, challenges like dendrite formation persist. Meanwhile, competitors like CATL and Toyota are also making strides in solid-state battery technology, with China leading the charge toward mass production.

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