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iOS 7: How to improve your iPhone 4S and iPhone 5 battery life, and reduce lag - ExtremeTech
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![Apple iPhone 4S battery test is complete, here go the results [TEST]](http://cdn.gsmarena.com/pics/11/11/iphone-4s-battery-life/gsmarena_002.jpg "Apple iPhone 4S battery test is complete, here go the results [TEST]")
Apple iPhone 4S battery test is complete, here go the results [TEST]
Apple iPhone 4S review - Battery (9) - CNNMoney
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