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China's new iron battery hits 99.4 percent efficiency over 6000 cycles
(interestingengineering.com)
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this post was submitted on 29 Apr 2026
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Counter point: I know exactly one person who learned Mandarin and several dozen who don‘t. Pretty much everyone learned english and (to a lesser degree) a third language that isn‘t Mandarin either. French, Spanish and Japanese are popular, though.