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Re:India Develops the World's First Iron-Ion Battery by explorigin on Monday August 26, 2019 @11:31AM (#20800662)
tl,dr:

- safer than lithium-ion

- "220 Wh/kilo, which is only around 55-60% of the 350 Wh/kilo of energy density for lithium-ion battery."

- "only capable of 150 cycles of charging and discharging"

Interesting but not there yet.

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