Some iPhone 5s have a battery issue (insert anti-Apple comment here). My wife's qualified for a replacement battery. The Apple store at the Mall of America was out of batteries. Since she had AppleCare (less than 2 weeks left to go), they gave her a brand new iPhone 5 as a replacement. Anyway, go here to see if your iPhone 5 qualifies: https://ssl.apple.com/support/iphone5-battery/