Apple's iPhone 8 Plus and iPhone X have Superior Battery Life over Samsung's new Galaxy S9 - Patently Apple
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iOS 15.0.2 Battery Life Test - iPhone 6s vs iPhone 7 vs 8 vs 7 Plus vs 8 Plus Battery Test in 2021 - YouTube
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Smartphone Battery Life May Be on the Decline Because Lithium Ion Batteries Can't Keep Up With New Technology - MacRumors
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Controlled Testing Supports Apple's Claim of Nearly Equal iPhone 6s Battery Life With TSMC and Samsung Chips - MacRumors
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