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Experiencing significant battery drain on Apple Watch post update

I've been experiencing significant battery drain since updating to watchOS 10.4 on my Ultra 2. I've rebooted it and even unpaired and started from scratch with no change.


A typical battery drain for me is 7-8% in the first 5 hours of my day (just sitting at my desk working), but since 10.4 that has increased to 30% drain in 5 hours.


I've tried submitting Feedback to Apple but the system diagnostic won't upload — tried this many times times in the past 2 days.


Super frustrating. Something is not right.


[Edited by Moderator]


Apple Watch, watchOS 4

Posted on Mar 12, 2024 7:19 AM

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Question marked as Top-ranking reply

Posted on Mar 12, 2024 3:53 PM

The same problem with new Apple Watch 9 😢 At the end of a day (23:00) it has 0% battery. Battery capacity is 100%.

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Mar 29, 2024 7:52 PM in response to jtovie

Mine is a Series 6 GPS and I’ve got the same problem. Apple is HORRIBLE about admitting mistakes, but this software version (10.4) should not have been released, it is flawed.


I’ve had these issues several times before and luckily, they usually focus on fixing the battery drain issue in the next couple minor update versions.


Prior to the 10.4 update, I was getting about a day and a half to two days of battery life. Now I get between half a day and maybe 3/4 of a day before it shuts off from 100%.

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Apr 14, 2024 5:05 AM in response to jtovie

FIXED! OK Apple Watchers! I have been right there with you experiencing staggering battery drain on my Ultra 2 since the Watch OS 10.4 update. My wife has the exact same watch with very similar setup. We updated both watches at the same time. Her watch did not experience any battery drain issues. Who knows why some of us took such a huge performance hit after this update while others did not? Considering the vast resources at their disposal, Apple can and should do a better job than this of scrutinizing all updates before release. While community beta testing feedback is certainly valuable, if it is being relied on too heavily, Apple has got to dedicate more resources to taking ownership of every update and every issue it might introduce to us. Enough about that already! Now for the fix! A couple of posts have mentioned a hard reset fix for this issue. I am extremely relieved to report that it works if done correctly!! First off, make certain that you know how to perform a hard reset on your watch and your iPhone. You have to do both! (Normal power off and on have no effect on this issue. Nor did any number of battery consumption reducing settings changes)

On the Ultra 2 watch a hard reset requires pressing the digital crown and the side button simultaneously and holding until the Apple logo appears. On newer iPhones, quickly press and release volume up then volume down and then press and hold the side button until Apple logo appears. I hard reset the phone first and then hard reset the watch while the phone was starting up. I wanted the phone to be up and running when the watch finished resetting and started searching for the phone. I hard reset both twice back to back. Maybe once would have done it but I am just reporting exactly what I did to get my watch back. I cannot express how frustrated and angry I have been (not without getting my post removed that is) about the battery performance loss on my Apple Watch Ultra 2 after updating to Watch OS 10.4 The watch is the most prized gadget I have ever owned and ever since I purchased it I have been overwhelmed by the technology and innovation that went into it’s design. That is why the hit I took after the update pushed me over the edge. That and the fact that I know Apple can do better. There needs to be a reckoning, perhaps a complete overhaul of the entire update development process. Please Apple: Don’t do this to me again.

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Apr 11, 2024 7:18 AM in response to jtovie

Exact same problem here, immediately after the 10.4 update. Prior to the update, I still had 15-20% battery life left at the end of the day after 17 hours and a workout. Since the update, I'm at 55-60% battery life by 9am, and the battery completely dies at around 6:30-7pm (13 hours of use). It's extremely frustrating. I'm reluctant to do a hard reset because last time I had to do that I lost 12 months worth of health data that I monitor very carefully for workouts and overall health.

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May 7, 2024 5:21 AM in response to jtovie

I’m still working through this. Sometimes my battery does well. Other times it tanks.


It does well after I force close all apps on the Watch — until I did a Workout yesterday. So, I’ve closed all apps again (Heart Rate, Fitness, I believe) & if I can narrow it down further or if it’s just the Workout.

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Apr 27, 2024 6:54 AM in response to jtovie

I’ve also been experiencing serious battery — intermittently, but regularly — probably since the update to 10.4 (Watch 5, I believe).


I’ve done a hard reset & adjusted some settings. Next, I’m going to hard reset both iPhone & Watch (as a couple commenters mentioned).

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Apr 27, 2024 10:09 AM in response to jtovie

Other users report that powering off the watch and then back on resolved the power drain issue.


M1 Mac mini, macOS 14.4.1;  Watch, series 7 GPS/cellular, watchOS 10.4; iPhone 12 Pro, iOS 17.4.1; TV 4th Gen, tvOS 17.4; HomePods, audioOS 17.4 and Airport Express w/ Airplay 2

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Experiencing significant battery drain on Apple Watch post update

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