eli5 Why can some batteries be recharged and others can’t?
In: Chemistry
It’s because of the different materials in the battery and mechanisms.
Rechargeable batteries like AA batteries or phone batteries have special chemicals inside that can be “recharged” by pushing electricity back into them. This reverses the chemical process that powers the battery.
Non-rechargeable batteries like AAA or 9V batteries have chemicals that get used up completely as the battery runs down. Once those chemicals are all used up, you can’t recharge or reverse that process.
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