Macworld October 13, 2026

How the new Apple Watch sensors affect battery life

Macworld Apple has radically overhauled the fundamentals of health tracking with the new Apple Watch Series 12 and Ultra 4. They have new sensors that are larger and take readings more frequently. During the day, the Series 12 and Ultra 4 measure heart rate every five seconds instead of every five m…

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How the new Apple Watch sensors affect battery life

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