How long does you iphone 5 (iOS7.0.3) battery last if you use it all the time?

How long does you iphone 5(iOS7.0.3) battery last if you use it all the time. To watch videos and chat to people?

An iPhone 5 is supposed to have 8 hours of video playback, according to the Apple site. Using the new iOS 7 update, however, could drain the devices battery by about an hour or two, especially since the iPhone 5 was not designed and launched with iOS 7 in the first place. I'd bet you would have at least 6-7 hours of video playback with iOS 7 and for other tasks it should last you a whole work day. If you want a specific answer, try looking up the iPhone 5c, which is the iPhone 5 covered in a plastic shell. No difference.