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Eh, my 4S had fair battery life in the beginning and only moderate in the end. Even new it was only claimed to get 6 hours of 3G web browsing which handicapped its usage if you were away from the charger too long.

Also, I don't trust any of these battery life apps in the app store. Apple does not allow these third-party app to access the data they would need to properly display battery health and capacity. At best they use algorithms to make a guess based on average uses and Apple's estimates.
 
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