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A comment on World’s largest battery maker announces major breakthrough in energy density. Parent comment

Re:World’s largest battery maker announces major breakthroug... by rdez6173 on Friday April 21, 2023 @08:57AM (#35653027)
Amprius has 400+Wh/kg that are commercially available. I'm sure they ain't cheap, but the tech exists.

https://amprius.com/products/

Edit: well, I'm a dummy and OP said mass-produced. Sorry.

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