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Apple Watch Series 4 to have a new design with more sensors and longer battery life? - HardwareZone.com.sg
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Apple Watch Series 4 - watchOS 7.4 DP2 - Huge battery drain when sleeping with Apple Watch, I know it's normal that you get battery drain right after a software update but
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Testing Apple Watch Series 4 half marathon battery life with cellular off: over 50% after 2 hours - 9to5Mac
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