ELI5, how do devices that use batteries, like phones, know the percentage of the charge remaining?
In: Technology
To be a little more more ELI5 than some of the other comments, a battery is like a water balloon. When the battery is fully charged, it’s like having a water balloon that is full to bursting. When you let the water out, it comes out harder and faster when the balloon is full than when the balloon is almost empty. The phone looks at how hard and fast the water is coming out to figure out how full the balloon is.
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