My iPhone 5 battery drains during lock?

Whenever I sleep, I never charge my iPhone, so it's basically next to me on lock. I think I slept to it being 38%. I slept for 11 hours (yup, I'm a potato.don't worry, this was only yesterday) and the next morning, I woke to the battery being like 25%. Just wanted to know if this is normal?

Yes.

Dang that's it? My iPhone 4S would probably be down to like low70's

That a great battery life. And that's normal because your phone is constantly working in the background, fetching data and updating all the apps on your phone. For 11 hours, that's amazing.

Iphone 5 is known for battery drain.

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