How do rechargeable batteries get recharged?

I'll do my best at explaining it for ya. To start, you need to understand how they work in the first place. Theres a chemical reaction going on inside of the battery that produces the electricity.

I'm not going to go into all the details involved in this with flowing ions etc. When you put a battery in a recharger, the electricity effectively forces the reaction to reverse, allowing it to happen again, providing more electricity. Eventually the system wears out, and the batteries won't hold a charge or will only last a few minutes. More.

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