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While the Verge Motorcycles spinoff Donut Labs has spent the last few months claiming to have solved solid-state batteries, science YouTuber Ziroth says he’s determined that the battery the company is testing is actually a lithium-ion battery cell. Among the evidence, as run down by Electrek, is the expansion pattern shown during VTT’s third-party testing, Donut’s “production vehicle” claims that didn’t add up, and a questionable history for CT Coatings, the battery tech’s apparent supplier. [Media: https://www.youtube.com/watch?v=j5oyVNjrUPI]