Apple Watch Series 8 battery drains too quickly

The checks in more detail

Apple's page on battery drain and Battery Health describes the checks: Settings, Battery shows the last day and what used power, and Battery Health shows maximum capacity; a figure under 80 percent means a service. The Always On display, a bright setting, raise-to-wake and cellular use are the main users. Workouts with GPS and music over cellular drain fast. Background App Refresh and many notifications add up. After a watchOS update, the watch spends days re-indexing. Restart and consider turning off the features you do not use.

Sleep tracking requires a charge of at least thirty percent overnight, and many owners charge the Series 8 during the morning routine or while showering to keep a day of tracking. A short top-up of fifteen minutes before bed supplies enough for the night. If you want to avoid charging gaps, set a charging reminder in the Sleep app so that you do not run out during the night and lose data. Over a year, many people notice that a new watch's habits settle: a Series 8 that was drained heavily during setup week will normalise.

If you use the temperature-sensing feature for cycle tracking, remember that overnight sensing happens on every night and uses a little battery. Compare days with and without sleep tracking and decide whether the trade-off suits you. Another cause of fast drain on a Series 8 is an app that keeps the heart-rate sensor active, such as a third-party fitness app left open; close apps from the app switcher by pressing the side button, swiping to an app and swiping it away. Also check that no workout is still recording in the background, which shows as a green icon at the top of the watch face.