(all pb)
You cannot recharge an aluminum air battery. They are fucking waste of time and electricity.
sauce - https://www.aluairbattery.com/Can-you-recharge-an-aluminum-air-battery-id3936928.html
You need to physically replace the plates, and the aluminum hydroxide needs to be converted back by thermal decomposition and hydrolysis. This is fucking expensive to do.
https://www.toppr.com/ask/question/the-conversion-of-aluminium-hydroxide-to-pure-alumina-is-carried-out-by/
https://www.aluminum.org/alumina-refining-101
https://www.quora.com/Is-it-cheap-to-recycle-aluminium-hydroxide-to-make-aluminum-How-is-the-process
There is no advantage whatsoever to doing this, unless of course you're cabal trying to weaken the electrical grid further.