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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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Apple Watch Series 4 Models Have Nearly 20% Less Battery Capacity Despite Same 'Up to 18 Hours' Battery Life - MacRumors
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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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