Level 1 (13 points)

Watch 10 battery life drops almost in half with WatchOS 27.0.1

Anyone having issues with battery life dropping significantly after upgrading to OS 27 on a Watch 10? I used to get 24-28 hours a day, now I get 12-14 hrs of life, usage hasn't changed. Battery health at 88%.

Apple so far is telling me I need to turn off features like Optimized Battery Charging, but it's going to 100%. And that I should turn off the always on screen....which used to be fine. Running 27.0.1.

Anyone else running into this? I did run the 27 consumer beta, but have upgraded to the final release version a couple of weeks ago, so shouldn't still be indexing.

Posted on Oct 8, 2026 3:50 PM

4 replies

WheelieNick

Level 9 (74,110 points)

Oct 9, 2026 5:33 AM in response to BrianPK3K

Hi there

Please try this

Force a Restart: Hard-restart your Apple Watch by holding down the Side button and the Digital Crown at the same time for about 10 seconds until the Apple logo appears. Never do this when updating watchOS!
Reset Sync Data: Open the Apple Watch app on your paired iPhone, tap General > Reset, and select Reset Sync Data to clear out stuck processes.
Check Background App Refresh: Go to the Watch app on your iPhone, select General > Background App Refresh, and turn it off or restrict it to essential apps only

BrianPK3K Author

Level 1 (13 points)

Oct 27, 2026 4:20 PM in response to BrianPK3K

Good news - the actual 27.2 release fixed the issue, was still happening on the RC, must have just fixed it at the last minute.

BrianPK3K Author

Level 1 (13 points)

Oct 13, 2026 9:57 PM in response to WheelieNick

OK, I tried unpairing and setting the watch up as a new device, but still having the same issue.

Let me try those other steps.

BrianPK3K Author

Level 1 (13 points)

Oct 22, 2026 10:33 PM in response to BrianPK3K

Still only getting 12 hrs even after going to the Genius Bar and even trying to update to the 27.2.0 Release Candidate.

Originally posted at discussions.apple.com/thread/256372778