ELI5: Explain Like I'm 5

Rechargeable battery

A rechargeable battery is a special type of battery that can be used and recharged over and over again. It works like a regular battery, but when the power runs out, you can plug it into a charger and it will fill up with power again. Rechargeable batteries can be used in many different kinds of things, like cell phones, computer laptops, remote controls, and toys.