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Compare battery life Galaxy Note 9 with some other flagship models: Galaxy S9 + / iPhone X / Huawei P20 Pro and OnePlus 6
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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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Extend Your iPhone's Battery Life by 3 Hours Using Low Power Mode in iOS 9 « iOS & iPhone :: Gadget Hacks
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