My iPhone 5 Battery Dies So Quickly?

My iphone 5 battery only lasts about an hour and i've tried most of the tricks in settings to allow it to last for longer but it just dies so quickly without me even using it. It will last about an hour max. I don't know the problem.Could I have a bug or my phone hacked? My phone sometimes shuts down apps as soon as i open them without me closing them? My phone can sometimes get hot. Also my phone will die on 20% and other various percentages, it never reaches 1%. I just watch my battery going down miraculously. Sometimes my phone will be on 50%and the next minute, 25?

Because of 4g and my phone shuts apps too its ok its that you have too much memory or too much things att once

The settings you change are only for common battery life problems. Such as battery lasting around 4 - 6 hours. As yours is only lasting around an hour then you have a severe battery problem and will need replacing. You can either do it yourself or go to an apple store and they will replace the phone for you.

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