Apple Watch battery draining fast after watch OS 11.5 update

Anyone else experiencing this issue?


Apple watch SE, only 1 month old. Battery percentage 100%.


Updated to 11.5 overnight last night, battery was at 100% at 7am this morning (UK time) and now, at 17:00 UK time, battery is down to 32%.


Haven't done anything with my watch, just been sat at my desk working.


Battery used to last me at least 24 hours but 11.5 seems to be sucking the life out of it!

Posted on May 16, 2025 9:13 AM

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Posted on May 27, 2025 3:48 PM

Ok - After hitting final frustration yesterday I have Repowered both devices (Watch 9 and phone), reset sync data and unpaired and repaired the watch. It looks like maybe thats done it. For people saying it takes 24 hours I have an iphone 15 pro with 62GB free, an Apple Watch 9 with 53 of 64GB free (Very few apps) so there is no way it should have taken DAYS to finish synching. I did track my sleep on the 25th so I'm picking I did the update that morning when back on charge (Sunday) and by Tuesday it was still running ridiculously down on battery life so it had all of Sunday, 24 hours of Monday and into the day Tuesday and wasn't "completed". Apple needs to improve the update experience as we shouldn't have to jump through random hoops hoping one of them will fix an unknown issue. Today after yesterdays restarts, repairing etc my watch is on 93% after getting it off the charger 2.5 hours ago which seems about right.


So basically if you are having this issue - Full power off and back on the watch, likewise phone, unpair and repair the watch from your phone. This is easy and restores your last backup which is run when you unpair I think (Certainly it was last run a short time ago). Hopefully that'll see your battery behaving again.

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Apple Watch battery draining fast after watch OS 11.5 update

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