100
‘World’s largest battery’ to provide 100-hour iron-air storage for Google data center
(interestingengineering.com)
this post was submitted on 01 Mar 2026
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Every week we can read about some new & exotic chemical processes that can (maybe, hopefully 😇) be used for batteries... but "the iron and the rust", that is old.
So: Why haven't we heard of any iron-rust-batteries before?
Oh. Damn.
So, that's why, I guess. 50% sounds terrible.
Oops? Now we are in business again? Maybe, hopefully 😇
I really find it interesting.
It's also clever politics. Minnesota has the largest iron mining operations in the entire United States, so choosing iron as your core battery technology is a smart (albeit cynical) way to drum to some local support with the promise of bringing new demand back to the taconite mines.
Whether that will be strong enough to overcome the extreme negative sentiments around datacenter projects? Who knows...
I hope tf not.
Hear hear.