How Does iPhone Battery — The 40-80% Lie Work?

The iPhone battery trick makes it look like your phone only uses 40-80% of its power, but that’s just a clever way to hide how much it really needs.

Imagine you have a big cookie jar with 100 cookies inside. Your phone is like a kid who wants to eat all the cookies, but instead of saying “I want 100 cookies,” they say, “I only need 40-80 of them.” That sounds much less greedy, and it makes the jar look like it has more cookies left than it really does.

Your iPhone has a special brain that checks how much battery is used. Sometimes, it doesn’t count everything perfectly, especially when you’re using your phone a lot in a short time. So instead of showing “your phone used 90% of the battery,” it shows “40-80%”, like it’s saying, “I only needed a little bit.”

If your phone really had 100 cookies and ate 90 of them, you’d be surprised! But since it says 40-80, you might think there are still plenty left, even though the jar is almost empty.

It’s like a game. Your iPhone plays tricks with numbers to make things look easier than they really are, but that doesn’t mean it can't run out of power soon.