Is this normal or should I have my battery replaced? (iPhone 5/iOS7.0.3)?

So I've been using my phone for 5 hours or so and my battery is at 22% :( is it my battery or iOS7.0.3?

It depends on what you are doing. If the phone is asleep, there's a problem. If you are busy talking or using wi-fi or cell networks or watching videos and such, it's not out of the question that you'd be at 22% after five hours. It also depends on how many apps you've enabled for background execution, whether or not you are using things like GPS or the compass, and so on. Screen brightness also makes a difference.

It's not iOS 7.0.3, in any case.

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