With the update to iOS 6 I began to notice a significant decrease in battery performance on my “old” iPhone 4. From the usual day of full usage (ending with a 20% charge available) I was inexplicably arrived at not being able to finish even half day without having to recharge my device. Powered by commitment and, after several attempts, I managed to bring my iPhone’s battery performances similar to the past. Here’s how I succeeded.
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