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For the biggest software-based battery saving, turn on Low Power Mode; for a less sweeping change, disable Background App Refresh for apps that do not need frequent updates. You can also reduce display activity, adjust workout sampling on supported models, and check connectivity and Battery Health if the drain continues. Apple does not publish a guaranteed number of extra hours for any individual setting, and the tradeoffs vary by feature, model, and watchOS version.
Which Apple Watch battery settings should you change first?
Choose changes based on what you can afford to lose: Low Power Mode makes broader cuts, while app-specific refresh and display adjustments are more targeted. Apple recommends Low Power Mode or preventing apps from refreshing in the background as ways to maximize battery life (Apple Watch battery-life guide).
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| Setting | Best fit | Main tradeoff |
|---|---|---|
| Low Power Mode | When you need a broad reduction in power use | Some health measurements, notifications, connectivity behavior, background refresh, and complication updates are disabled or reduced |
| Background App Refresh | When only particular apps need less background activity | Those apps may show less current background information |
| Always On, brightness, and wake controls | When you want to reduce display activity | The face may be harder to see at a glance or take an extra action to wake |
| Fewer GPS and Heart Rate Readings | For long outdoor workouts on supported models | Some workout metrics and alerts are unavailable |
These are qualitative comparisons: Apple’s reviewed support pages do not state how many hours any one toggle adds.
Turn on Low Power Mode when you need a broad saving
On the watch, press the side button to open Control Center, tap the battery percentage, then turn on Low Power Mode. You can also open Settings > Battery > Low Power Mode. Apple says the watch prompts about Low Power Mode when the battery reaches 10% (or lower, as the user guide phrases it); it automatically turns off after charging to 80% unless you chose a duration (Apple’s Low Power Mode instructions; battery-life guide).
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Low Power Mode reduces or disables several functions, including Always On, background heart-rate and blood-oxygen measurements, and some heart-rate notifications. It may also delay other notifications, limit some Wi-Fi and cellular behavior, and reduce background refresh and complication updates. The exact effects depend on whether the paired iPhone is nearby and on the features available on your watch. If you rely on health measurements or timely notifications, use it selectively rather than assuming it is a no-cost permanent setting.
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Turn off refresh for selected apps
Go to Settings > General > Background App Refresh. Disable refresh globally if you rarely need apps to update in the background, or switch it off only for apps whose information does not need to stay current. This targeted option is a practical first change if you want to preserve other watch functions.
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Review active watch-face complications
Complications on the active watch face continue to refresh even when Background App Refresh is off, according to Apple. If a complication frequently updates information you do not need at a glance, consider changing the face or removing that complication. Apple does not quantify the battery saving from this change.
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Turn off Always On, if your model supports it
Open Settings > Display & Brightness > Always On and turn off Always On. Apple lists the feature as on by default for Apple Watch Series 5 and later, SE 3, and Ultra and later. With Always On enabled, the display dims when your wrist is down; turning it off means you need to wake the display to see the watch face. Always On is already unavailable while Low Power Mode or Theater Mode is active (Apple’s Always On instructions).
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Lower brightness or change wake behavior
In Settings > Display & Brightness, lower the brightness, turn off Wake on Wrist Raise or Wake on Crown Rotation, or change Wake Duration. These controls reduce display brightness or activity by design, but Apple does not give a per-setting battery-hour estimate. Try the adjustment that best fits how you use the watch rather than expecting a specific runtime gain (Apple’s display settings guide).
Extend battery use during supported outdoor workouts
For outdoor walking, running, or hiking, supported watches can reduce how often GPS and heart-rate readings are taken while Low Power Mode is active. The setting is Settings > Workout > Fewer GPS and Heart Rate Readings. Apple documents availability for watchOS 9.1 and later on Apple Watch SE (2nd generation), Series 8 and later, and Ultra and later (Low Power Mode instructions; Apple battery troubleshooting).
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Reduced sampling is aimed at longer workouts, but it sacrifices detail: workout alerts are off, splits and segments are not recorded, and current pace is unavailable while the setting is active. Leave it off when those measurements or alerts matter more than extending battery use.
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Check connectivity and recent updates if battery drain persists
- Stay connected to the paired iPhone over Bluetooth when possible. Apple says this is the most efficient connection. When away from the iPhone, use Wi-Fi rather than mobile data where possible and keep a strong signal. If you do not need connectivity in an area with weak Wi-Fi or no mobile coverage, Airplane Mode may help.
- Give a recent software update time to settle. Apple says update-related work may continue in the background and affect battery life. If the drain began after an update, wait a few days and check again.
These checks and recommendations are in Apple’s battery-drain troubleshooting guide.
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Check Battery Health before assuming another setting will fix it
Open Settings > Battery > Battery Health to see Maximum Capacity, which compares the battery’s capacity with when it was new. If Battery Health reports “Battery Needs Service,” or you think the battery needs replacement, contact Apple Support. Apple’s guidance does not establish a universal percentage threshold for replacement, so do not treat one capacity figure as a diagnosis (Apple battery troubleshooting).
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