wish there were portable electronics devices, like phones or whatever, that you could *feed*. like, with a chemical fuel
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like, I've vaguely imagined a scheme where you could make completely disposable one-use batteries exploiting the oxidation of a more or less harmless metal, like magnesium or aluminum
but it would be really cool to make a phone where you could just feed it bits of scrap aluminum and empty out the Al2O3 periodically
