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Everyone wishes they could get more out of the battery built into their iPhone or iPad. Apple has set up the operating system with convenience in mind, and some of these settings don't necessarily give the best battery life possible.Fortunately, there’s a lot you can do to help you squeeze more out of each charge. Let’s take a look at a few things you can do.
Drop the screen brightness
One of the easiest ways to improve battery life on the iPhone is to drop the screen brightness. When I updated my iPhone 4 from iOS 4 to iOS 5, Apple jacked the brightness up to an unnecessary ’supernova’ level. Unless I’m outdoors, I usually keep my screen pretty dim.
Settings > Brightness
Auto-Lock the screen
Another tip that makes a big difference is to lock the screen after a short interval. This helps conserve battery life because it turns the screen off when your handset is not in use. Set it to go off after a minute or two.
Settings > General > Auto-Lock