Suddenly battery has been draining very quickly

Hi

Battery life varies depending on use and other factors. Examples are detailed here:

Apple Watch - Battery - Apple

Apple's tips for maximising battery life on Apple Watch are detailed here:

Batteries - Maximizing Performance - Apple

If your Apple Watch is experiencing significantly shorter battery life than Apple's examples suggest that you should expect, then it may help to follow these steps, which have previously resolved battery life issues for other users, including after software updates and switches to a new iPhone, when usage has not otherwise changed (check after each):

If you have not yet done so, update your iPhone and Apple Watch to the latest compatible software versions, starting with your iPhone:

• Update the iOS on your iPhone, iPad, or iPod touch - Apple Support
• Update your Apple Watch - Apple Support

Restart (normally) both your iPhone and your Apple Watch, turning both off together and then restarting your iPhone first:

• Restart your iPhone, iPad, or iPod touch - Apple Support
• Restart your Apple Watch - Apple Support
• If the issue persists, next close open apps on your iPhone and then restart both devices again.
• Do not force restart your Apple Watch unless it is unresponsive and cannot be restarted normally.

If you have ever (not necessarily recently) previously used the Workout app and/or any third-party fitness or sleep tracking apps to record workouts on your watch, check on your Apple Watch to see whether there is a paused activity within any of them. If there is, end that activity from within the app on your watch (not your iPhone).

• If in doubt, remove any such third-party apps from your Apple Watch.

Unpair and re-pair your Apple Watch:

• The Watch app on your iPhone takes a backup of your watch automatically when unpairing via the app.
  • When setting it up again, initially choose to Restore from Backup. Most data and settings will be restored, with some exceptions (eg Apple Pay cards, passcode).
  • If the issue persists, consider instead unpairing and setting it up as a new watch.
• Unpair your Apple Watch and iPhone - Apple Support
• Set up your Apple Watch - Apple Support

Some users have previously experienced battery life issues in connection with using corporate profiles and/or Exchange Calendars. If you are using an Exchange Calendar, one or more of these steps may help:

• Archive your Exchange Calendar for all items before today.
• Remove / delete all old inbox messages relating to calendar invites (accept and decline notifications).
• Create a rule in your Outlook Mail account that moves all future accept and decline replies, immediately upon receipt, into a separate mail folder that does not sync with your iPhone and Apple Watch.
• Check your Exchange Calendar for errors.

Finally, it may help to:

• Remove third-party apps from the Dock and/or from your watch and then monitor battery performance after adding them back, one at a time:
  • Open apps
• Remove watch face complications and monitor battery performance as you add them back:
  • Change the watch face on your Apple Watch - Apple Support

Having tried the previous steps, if your remain concerned that battery life is shorter than it should be, then I suggest contacting Apple Support (remote diagnostics and/or mail-in service may be available, if required), making a Genius Bar reservation or visiting an Apple Authorised Service Provider for assistance:

• US: Apple Watch Service Answer Center - Apple Support
• Elsewhere: Select your country for Apple Watch service and repair information

First, what model watch do you have and what OS are you using? In the meantime, have you rebooted your watch (hold down the side button and crown until the Apple logo appears.

If that doesn’t work, reply back.

Some of the things listed by Jonathan UK could certainly help. Reply back if you’ve seen improvement after restarting both devices. Strange that it suddenly took a dive.

The times that has happened to me is when: (1) I had a background process like the Activity App running (forgot to stop it); (2) when I thought/assumed the watch was on the charger correctly, but it turns out it wasn’t and really didn’t charge (I just put it on each morning an never really look).

If nothing changes after your reboot or trying some of the suggestions from Jonathan’s post, you can try to unpair and then pair. If that fails, then I think starting fresh and adding back one app at-a-time (each day) might do the trick. Make sure you have a few days of good battery life berfore adding any apps. I had to do that recently with my iPhone and found a unique bug that Apple is currently investing how to fix.

Of course, you can always take it in, but it would be worth having them look after you’ve tried some of these things.

Great - you're most welcome! 🙂

Yes, you’re welcome!