There also exist truly recharchable alkaline cells, the RAM cells. https://en.wikipedia.org/wiki/Rechargeable_alkaline_battery
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Alkaline batteries should never be charged. It should never even be attempted, as they could easily explode.
There also exist truly recharchable alkaline cells, the RAM cells. https://en.wikipedia.org/wiki/Rechargeable_alkaline_battery
If they are discharged by less than 25%, they can be recharged for hundreds of cycles to about 1.42V.
If they are discharged by less than 50%, they can be almost-fully recharged for a few dozen cycles, to about 1.32V.