Scotty Loveless, a former Apple Genius, has posted the best guide we’ve seen to solving iOS battery drain. Unlike many guides that tell you to turn off every feature, Loveless offers a more targeted approach, including instructions on how to test battery drain and specific suggestions that are likely to improve battery life. Two surprises: the Facebook app is a huge battery hog and quitting apps may hurt battery life. follow link
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The Ultimate Guide to iPhone Battery Drain
I could see that my wife's iPhone 4S was never sleeping (Usage and Standby times were equal). GREAT! I finally had a diagnosis of the problem.
How come this advice is not better known?
But, Apple offers no insight nor tools to help fix this.
Force quit every app - nope. Restarts - nope. Upgrade to iOS 7 - nope. More Restarts - nope. Turn off Location Services - nope. Turn off Background App Refresh - nope. More force quits - nope. Install Battery Performance Monitor apps - nope.
So now what?
Installing System Activity Monitor app helped, but the savings finally came from deleting an old Mail account which obviously was caught in a loop.
Surely Apple could give tools to identify issues like this earlier?