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iPhone 6 vs iPhone 6s vs iPhone 7 vs iPhone 7 Plus Battery Life Drain Test in 2022 - NO PUBG - YouTube
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iPhone 6s vs iPhone 7 vs iPhone 8 vs 6s Plus vs 7 Plus vs 8 Plus vs iPhone X Battery DRAIN Test 2022 - YouTube
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Apple says iPhone 6s and 6s Plus battery life may vary 2-3% regardless of Samsung or TSMC chip - 9to5Mac
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