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Why aren't there 1.5v AA rechargeable batteries?
(lemmy.world)
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this post was submitted on 25 Dec 2024
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my understanding is that the nominal voltage you get out of a cell is always dependent on the chemistry it's using. alkaline battery cells are always 1.5V until they run down. even a 9V battery is actually six little 1.5 V cells in series in its little rectangular box. NiMH cells are 1.2V. Lithium batteries are actually a variety of different chemistries, but i think all of them have upwards of 3V nominal voltage, so they wouldn't make a good drop in replacement either without some kind of voltage regulation circuitry.