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iPhone 6 and 6 Plus get extended battery life
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Incredible Battery Life - Apple's iPhone 4: Thoroughly Reviewed
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iPhone 6 vs. iPhone 6s Buyer's Guide - MacRumors
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Exchangeable Battery for iPhone 6S+/6+, iPhone 6S/6?
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iPhone 7 Vs iPhone 6S: What's The Difference?
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The iPhone 4S and the 100 hours of lost standby time | ZDNET
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iOS 5 battery issues are real, Apple deploys a fix with 5.0.1 — but it's not over yet - The Verge
iPhone News - Battery life comparision of iPhone 4S to 6 plus: Source: google | Facebook
iPhone 3G - First Battery Life Results
The Whole Sad History Of iPhone Battery Life, In 1 Chart | HuffPost Impact
Battery Life and Charge Time - The Apple iPhone 6s and iPhone 6s Plus Review
iPhone 6 and iPhone 6 Plus Review – MBReviews
