Batteries store energy for us to use in tons of everyday things like phones, toys, and more.
When something is powered by batteries and we turn it on, the battery is giving out energy that can be used to make something move, turn on lights, or make sounds. But batteries can only store a certain amount of energy, and it will eventually run out of energy to give. If you have a remote controlled toy at home, you might notice that it moves slower when the battery starts to run out of energy. But when you put in a new battery or recharge the battery in the toy, the toy can move fast again!
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