The most common battery drains on Apple Watch
Your Apple Watch battery drains fastest when the screen is on, when it is searching for a cellular or Wi-Fi connection, and when apps are running in the background. If your watch dies much faster than it used to, one of these is almost certainly the culprit: always-on display, location services running constantly, Bluetooth searching for your phone, or a single app that wakes the watch repeatedly.
The watch also drains battery when it is syncing data to your iPhone — fitness data, messages, emails, and calendar events all pull power. If you have just set up the watch or restored it from backup, the first 24 hours will show worse battery life than normal because the sync is still catching up.
Temperature matters too. Cold weather drains the battery faster because the battery chemistry slows down. If you wear your watch outside in winter, expect the battery to drop more steeply than it does indoors.
Key Takeaways
- The always-on display and location services drain battery the fastest; turning off either one can add hours to your watch's day.
- Apps running in the background, especially fitness and weather apps that update constantly, pull power even when you are not looking at them.
- A watch that is searching for a Bluetooth connection to your iPhone or trying to connect to Wi-Fi drains much faster than one that is already paired.
- New watches or recently restored watches drain battery faster for the first day or two while they sync data from your phone.
- Cold weather and high screen brightness both reduce how long the battery lasts on a single charge.
Turn off the always-on display
The always-on display is the single biggest battery drain on most Apple Watches. If your watch shows the time and complications even when you lower your wrist, that feature is costing you several hours of battery life per day.
To turn it off, open Settings on your watch, tap Display & Brightness, then tap Always On and toggle it off. Your watch will now go dark when you lower your wrist and light up only when you raise it or tap the screen. This change alone often extends battery life by 4 to 8 hours, depending on how often you check your watch.
If you want the display to stay on but use less power, you can also lower the brightness. In the same Display & Brightness menu, adjust the brightness slider to a lower level. A dimmer screen uses less battery but may be harder to read in bright sunlight.
Check which apps are running in the background
Apps on your Apple Watch can keep running even after you close them, pulling battery power to update information, check for notifications, or track your activity. Fitness apps, weather apps, and news apps are the most common culprits because they refresh data constantly.
To see which apps are allowed to run in the background, open the Watch app on your iPhone, go to Privacy, then tap Background App Refresh. You will see a list of every app with permission to run in the background. Toggle off any app you do not need to update while you are not using it — for example, if you do not check weather on your watch, turn off background refresh for the Weather app.
If a single app seems to be draining the battery unusually fast, try uninstalling it from your watch and reinstalling it. Sometimes an app gets stuck in a loop that drains power; reinstalling it often fixes the problem. To uninstall, press and hold the app icon on your watch, then tap Remove.
Fix Bluetooth and Wi-Fi connection problems
When your Apple Watch cannot find your iPhone or connect to Wi-Fi, it keeps searching, and that searching drains the battery quickly. If your watch is far from your phone or in a place with poor Bluetooth signal, the battery will drop noticeably faster.
The simplest fix is to keep your watch and iPhone close together — within about 30 feet in most homes. If you are away from your phone for long periods, your watch will drain faster because it is constantly trying to reconnect.
If your watch has cellular service, make sure you actually need it. Cellular watches use more power when they are searching for a cellular signal, especially in areas with weak coverage. If you rarely use cellular features, you can turn off cellular in Settings on your watch, then tap Cellular and toggle it off. This tells your watch to rely only on Bluetooth and Wi-Fi, which use less power.
Turn off location services you do not use
Location services — the GPS and compass features that track your position — drain battery quickly because they are constantly calculating where you are. If you have location services turned on for apps you do not actually use for navigation or fitness tracking, you are wasting power.
Open Settings on your watch, tap Privacy, then tap Location Services. You will see which apps have permission to use your location. Toggle off location services for any app that does not need it. For example, if you do not use the Maps app on your watch, turn off location services for Maps. If you only use GPS during workouts, you can leave it on but make sure background app refresh is off for location-heavy apps.
Keep in mind that turning off location services for fitness apps will make your workout data less accurate — the watch will not record your exact route. If you care about that data, leave location services on for your fitness app but turn it off for everything else.
Reduce notifications and email syncing
Every time your watch receives a notification, email, or message, the screen lights up and the processor wakes up to display it. If you are getting dozens of notifications per hour, your watch is waking up dozens of times, and that drains the battery.
Open the Watch app on your iPhone, go to Notifications, and review which apps are allowed to send you notifications on your watch. Turn off notifications for apps you do not need to see when ready — for example, you might want messages and calls but not social media alerts. The fewer notifications your watch receives, the less often it wakes up.
You can also limit email syncing. Open the Watch app on your iPhone, go to Mail, and choose how many recent emails to sync to your watch. Syncing fewer emails means less data transfer and less battery drain. If you only check email on your phone, you can turn off mail on your watch entirely.
Check for a stuck or misbehaving app
Sometimes a single app will malfunction and drain the battery much faster than normal. The app might be stuck in a loop, checking for updates constantly, or trying to connect to a server that is not responding. If your battery started draining suddenly and nothing else changed, a misbehaving app is a likely cause.
The fastest way to find out is to force restart your watch. Press and hold both the side button and the digital crown for about 10 seconds until you see the power-off slider, then drag it to turn off the watch. Wait a few seconds, then press and hold the side button again until the Apple logo appears. Let the watch restart completely.
After the restart, use your watch normally for a few hours and see if the battery drains at the same fast rate. If the battery life improves, the restart fixed a stuck process. If the battery still drains quickly, try uninstalling the app you use most often and see if that helps. If battery life improves after you remove an app, that app was the problem — you can reinstall it later or look for an alternative.
When to check for a hardware problem
If you have turned off the always-on display, disabled background app refresh, fixed your Bluetooth connection, and reduced notifications, but your watch still dies in a few hours, the battery itself may be failing. Apple Watch batteries degrade over time, and after about 3 years of daily use, the battery may no longer hold a full charge.
You can check the battery health of your watch by opening Settings on your watch, tapping About, and scrolling down to Battery Health. If the maximum capacity is below 80 percent, the battery is degraded and may need replacement. Apple offers battery replacement for a fee — the cost varies by watch model, but it is usually between $60 and $100.
If your watch is still under warranty or covered by AppleCare+, battery replacement may be covered at no cost. Check your coverage by visiting apple.com/support or calling Apple Support. If the watch is out of warranty and the battery is the problem, you can choose to replace the battery or upgrade to a newer watch.
Frequently Asked Questions
Why does my Apple Watch battery drain so much faster in cold weather?
Cold slows down the chemical reactions inside the battery, so it cannot deliver power as efficiently. This is temporary — when the watch warms up, the battery will work normally again. If your watch shuts off in the cold even though the battery showed charge, it is not actually dead; bring it inside and let it warm up for 30 minutes.
Does turning off Bluetooth save battery on my Apple Watch?
Turning off Bluetooth will save some battery, but your watch will no longer connect to your iPhone, and many features will not work. It is better to keep Bluetooth on and make sure your watch and phone are close together so they stay connected without searching.
Can I replace the battery in my Apple Watch myself?
No. Apple Watch batteries are glued in place and require special tools to remove safely. Attempting to replace the battery yourself will damage the watch. Contact Apple or an authorized repair shop to have the battery replaced professionally.
Does screen brightness affect battery life on Apple Watch?
Yes. A brighter screen uses more power. If you lower the brightness in Settings, Display & Brightness, you will extend battery life, but the display may be harder to read in bright light. Find a brightness level that works for your lighting conditions.
Why is my new Apple Watch draining battery so fast?
New watches drain battery faster for the first 24 to 48 hours because they are syncing data from your iPhone — fitness history, photos, apps, and settings all transfer during this time. After the initial sync completes, battery life will improve. If the fast drain continues after two days, check the settings above.