If your Apple Watch used to make it through the day without issue but now needs a midday charge, something changed. It might be a watchOS update that reset a setting, a newly installed app running in the background, or a battery that has degraded enough to show up in real use. Each cause has a different fix.

This guide covers the ten most common reasons an Apple Watch battery drains too fast and what to do about each one. Work through them in order. The first few are the most common and take under a minute to check. For background on what normal battery behavior looks like, see the Apple Watch battery life guide. If you suspect your battery is degraded rather than just misconfigured, check the Apple Watch battery health guide first.

Key Takeaways

• The Always On Display and background app refresh are the two most common causes of faster-than-normal battery drain

• A watchOS update can reset settings that affect battery life; check your display brightness and notification settings after any update

• If the battery health percentage is below 80%, no settings change will fully restore normal battery life; replacement is the fix

Fix 1: Turn Off Always On Display

The Always On Display (available on Apple Watch Series 5 and later) keeps the watch face visible even when your wrist is down. It is one of the largest individual battery drains on any Apple Watch model that has it.

To turn it off: Settings > Display and Brightness > Always On > toggle off.

This one setting can add several hours to your battery life depending on how active your wrist is during the day. If you are losing 20-30% more battery than you expect, start here.

Fix 2: Reduce Screen Brightness

A higher screen brightness uses more power. On Apple Watch, you set brightness at Settings > Display and Brightness. The slider has three preset positions (low, medium, high). Try dropping from high to medium; most people cannot see a meaningful difference in readability but do see a battery improvement.

Fix 3: Turn Off Background App Refresh

Apps running in the background use the watch's processor and radio, draining the battery even when you are not actively using them. Turn off background refresh for apps that do not need real-time updates.

On iPhone: Watch app > My Watch > General > Background App Refresh. Toggle off any apps you do not need updating constantly, or toggle off the top-level switch to disable it for all apps at once.

Fix 4: Reduce Heart Rate Monitoring Frequency

Continuous heart rate monitoring is useful for health tracking but uses the optical sensor constantly. If battery life is the priority, you can reduce how often it checks.

On the watch: Settings > Privacy > Health > Heart Rate > toggle Fitness Tracking and Heart Rate to off (this stops workout detection and constant monitoring). Alternatively, in the iPhone Watch app > My Watch > Heart Rate, you can disable high heart rate and irregular rhythm notifications, which reduces how aggressively the watch checks.

Fix 5: Check for a Rogue App

A misbehaving third-party app can drain the battery much faster than normal. If the drain started after installing a specific app, that is your first suspect.

Unfortunately, Apple Watch does not show per-app battery usage the way iPhone does. The workaround: open the Watch app on iPhone, go to My Watch, and uninstall recently added apps one at a time to see if the drain stops. It is blunt but effective.

Fix 6: Turn Off Wake on Wrist Raise

If you move your wrist frequently during the day (cooking, exercising, animated gestures), the watch wakes constantly. Each wake activates the display and uses power. If you are on a model without Always On Display, turning off Wake on Wrist Raise entirely and relying on tapping the screen to wake it can noticeably extend battery life.

Settings > Display and Brightness > Wake on Wrist Raise > toggle off.

Fix 7: Reduce Notification Volume and Haptics

Every notification activates the watch: it lights the screen, fires a haptic tap, and sometimes plays a sound. If you get a lot of notifications, turning them off for apps that do not need your immediate attention reduces battery draw.

On iPhone: Watch app > My Watch > Notifications. Go through each app and turn off notifications for the ones that do not need to interrupt you on the watch.

Fix 8: Disable Cellular When Not Needed (Apple Watch with LTE)

If you have an Apple Watch with LTE, the cellular radio uses significant power. If you typically have your iPhone nearby, there is no reason to use cellular on the watch. Keeping it in Wi-Fi or Bluetooth mode uses less battery.

On the watch: swipe up to open Control Center, tap the cellular icon to toggle cellular off. The watch will fall back to Bluetooth and Wi-Fi connections with your nearby iPhone.

Fix 9: Restart Your Apple Watch

Occasionally, a software process gets stuck and runs continuously without doing anything useful. A restart clears these processes.

Hold down the side button until the Power Off slider appears. Drag the slider to power off. Hold the side button again to restart. After the restart, monitor battery drain for the rest of the day to see if it improved.

Fix 10: Update watchOS

Apple releases watchOS updates that often include battery performance improvements. An old version of watchOS may have a known bug causing excessive drain that a newer version fixes.

On iPhone: Watch app > My Watch > General > Software Update. If an update is available, install it. Make sure the watch is on the charger and has at least 50% battery before starting a watchOS update.

When Settings Changes Are Not Enough

If you have worked through all ten fixes and the battery still drains too fast, the issue is likely the battery itself rather than a software setting. Check your battery health at Settings > Battery > Battery Health on the watch. If the number is below 80%, no software fix will fully restore normal battery life. See the Apple Watch battery health guide and the battery replacement guide for next steps. Also see the Optimized Battery Charging guide if you want to understand how that feature affects long-term battery performance.

Your Apple Watch Data and Daily Energy

An Apple Watch that makes it through the day collects continuous health data: heart rate, activity, recovery, and sleep quality. Lifestack uses this stream of data to understand your energy patterns and schedule your work tasks accordingly. When your watch dies at 2 PM, you lose the afternoon data that would otherwise tell Lifestack you have a mid-afternoon energy dip and should not schedule deep work during that window.

Keeping your Apple Watch running all day is not just about convenience; it supports better planning. If you are interested in how wearable data connects to daily performance, the guide to task management for inconsistent energy covers the concept and tools in detail. Lifestack starts at $9.99/month, with a 7-day free trial on the annual plan at $49.99/year.

FAQ

Why is my Apple Watch battery draining so fast after an update?

watchOS updates sometimes reset settings like Always On Display or Background App Refresh to their defaults. After an update, go through Settings > Display and Brightness and Watch app > My Watch > General > Background App Refresh to confirm your preferred settings are still in place. Also give the watch 24-48 hours after an update; some indexing processes that run after updates temporarily increase battery use and then settle down.

Is 10% battery drain per hour normal for Apple Watch?

It depends on what you are doing. During an outdoor workout with GPS active and cellular enabled, 10% per hour is normal. During normal desk use, 5-7% per hour is more typical. If you are losing 10% per hour doing nothing active, that suggests a rogue app, a software process stuck running, or a degraded battery.

Does Low Power Mode help significantly?

Yes. Low Power Mode (Settings > Battery on the watch) reduces heart rate monitoring frequency, turns off background app refresh, and disables always-on display. It significantly extends battery life. The tradeoff is that some health tracking features become less accurate and some notifications are delayed.

Can a watchOS update fix battery drain?

Sometimes. Apple does release updates that fix battery drain bugs. Check for a watchOS update via Watch app > My Watch > General > Software Update. If a newer version is available, install it and monitor battery behavior afterward.

How long should an Apple Watch battery last per charge?

It depends on the model. See the Apple Watch battery life guide for expected battery life by model and the factors that affect it most.