Iphone 5 on ios 7 battery drain?

So I have an iphone 5. Now my battery dies extremely fast. I'm talking it'll be on 100% and go to 50 randomly. It also cuts off on high percentages. My battery never goes to zero. It always just will cut off fat any given percent, typically a high one. What can I do to fix this as it is a serious problem

This is one for the nerd herd at apple. There may be a short somewhere in the phone, or it could be a faulty battery- so no home fix.

I have the same problrm… Hope the next update will fix this problem

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