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Interesting. My understanding is that air-aluminum fuel cell tech has been around awhile. I thought it was originally investigated as a stationary power storage back in the 70's. One of the problems is the electrolyte "gels" during battery consumption and that reduces power output. I remember reading something about 5-6 years ago about pumped-electrolyte "batteries" based on air-aluminum fuel cells being tested. I also thought there was an Israeli company trying to commercialize the air-aluminum fuel cell already.
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