Why is my iPhone 5 losing battery?

My iPhone is a few months old, it has been working great until a week ago the batter stopped holding. I left it in the car for a few hours and it lost 10 percent. My phone just died at 4 percent battery not one, then when I started charging it it started at 4. Just a minute or two later it went to 13 percent, and it keeps radically increasing. Is there anything I can do?

Well batteries in Iphones aren't the best so they wear out easily.

TIP: Try not to charge phones with car charges. That will reduce how long the battery lasts.

Get a new charger, same thing happened to my ipad

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