Battery drain in WatchOS 8 on Apple Watch 6

I was about to try the suggestions, but did not get around to it. After about 5 days or so of the short battery, it fixed itself. Two days now of normal battery life without resetting anything.

I seem to remember other apple updates to things that consumed batteries for the first few days as well. maybe they should put that as a note on updates?

iPhone XS Max, watch series 4.

Before updated, the watch can use more than 16 hours. After updated, can only use up to 8hours only. Battery management shows the health up to 95%. Everytime pick up the watch after charged, it slowly fall down the percentage (which I feel really wrong on the figures), and up to around 8 hours, the watch SHUT DOWN at 63%!!!!!!! yes, is sudden dead! then I put back to charger, it restart the watch and shows charging at around 60%..... and the charging time only takes around 20mins back to fully charge 100%...... after that I can use another 8 hours, and dead again at 63%........ really really frustrated and this MUST be the OS problem (bug).........

I have try unpair and pair, didn't help. then I erase everything and set up as new watch, problem still.......

feel hopeless ..... and more like Forcing you to buy a new series 7......

a BIG fail to the watchOS update..... big big fail......

really disappointed.....

in general my approach with the watch is not to double the functionality of the iPhone I have .

for example, I have ms teams and ms outlook buzzing all the time in my iPhone so why would I have the same notifications on my watch?

same with messenger Viber watzapp etc.

when you limit the apps to health and sports the battery life is ok.

of course i am still using the basic pack like google maps navigation, nfc payments.

so I did the updates yesterday and at first it seemed great. the first few hours were normal. Then the next hour it started to drain again. Took my watch off the charger this morning about 6:30am and now at 8:11 it is down to 88 percent wont last the day at this rate. might try the unpair pair again trick and see if that works.. so frustrating as my watch was working perfectly 4 days ago. I was getting 2 days out of it. now i can barely get a day. Support did a diagnostic and it said it was fine but i am skeptical.

Ok, so I've seen a lot of people talking about watch face location services as being the problem for this massive battery drain. I've blocked this feature and will test this out tomorrow and see if this will finally stop the 4 month long battery drain issue. Also, has anyone notice that when we update these watches it appears that Apple is adding more features in settings that's automatically turned on instead of allowing the user to turn the new feature on? Maybe I'm crazy but I've notice stuff like this over the past few months that wasn't in settings before.

Hi again…

I un-paired and erased the Watch and now it's battery seems work well.

Try to set it up like a new Watch

Regards

My watch battery was dropping like the photo shows.

Update: Apple have replaced my series 6 under the limited warranty. Replacement is fine now running in latest software.

Try turning on water lock this worked for me.

Be sure and hit the Me Too button at the top of the first page of this thread. So far, only 508 people have been counted. We need this post to rise to Apple’s attention.

Yes, i tried both ways, pairing and full resetting to a new watch while also using Apple support for guidance. Now the battery is only lasting 4 hours in a day. I am convinced the culprit is the workout app since I used that app for 3 hours in the day that the battery died at 4 hours. Will report this to Apple.

The past couple of days my watch 4/cellular has finally been operating "normally." Which is to say that I charge it early in the morning and it operates all day&night long, starting the day around 15%-30% after 20 hours of use. Two weeks ago, and 3-4 software versions earlier, it was draining to dead in matter of hours. Dunno why it's acting differently now b/c my usage patterns have not changed an iota. I unpaired/paired two weeks ago when I first noticed the problem but that didn't help. What helped (I think) was rebooting the phone when I noticed a problem. Strange.

For me the issue began

from iOS 15 and Watch os 8 .

multiple unpairs , resets , updates to 15.1 and 8.1 didn’t help .

Watch application shows a lot of error logs (general > diagnostic logs ) “jetsamEvent “ in logs something bug_type 298.

Ok, so I noticed that my Series 3 (GPS+Wireless) watch is working normally. In 12 hours of using the watch, the watch has only used 11% of battery. That's with me using the watch for receiving text messages and tracking my steps (which is what I've only use the watch for since getting it back earlier this year...... March 2021) Now when I try to use the Series 3 (GPS only which I got last November 2020) watch in the same manner during the weekdays, I'm barely making it through the day. After only 8-10 hours of use, I'm making it home with 40%-35% battery left.... if I'm lucky. Before the August 2021 update (first week in August) I was making it to two days off one charge. Again, I work in a warehouse, so I only have messages notifications on and the fitness (how many steps I've walked) tracker on. Everything is turned off or uninstalled from my (GPS only) watch. Also, when I took both watches to the Apple Store to ask what was going on and why there's a difference between the two watches, I was told that both watches were showing at 100% healthy battery life. They sent the GPS Only watch off to be looked at and they couldn't figure out what was wrong with the watch and sent it back to me without any explanation. I've asked the Apple Tech(s) over the phone why this is and they've told me I can't really compare the two watches, but I would think the LTE+GPS watch would be the one draining quickly since it's during more (making phone calls and connecting to cell phone towers.) I've spent almost three months investigating and I've come to the conclusion they're not messing with the LTE+GPS watches but only the GPS watches for all Series 3, 4, 5, 6 models as they want all of us to upgrade to this newer model seres 7 watch. This is just from everyone complaining about the cheaper models of the two for each series (GPS Only) experiencing the battery draining. It's impossible for a watch to have a 100% healthy battery and it's draining like crazy and I don't have anything really running on it besides messages and foot steps tracker turned on. Plus, it started doing this 9 months after buying the watch...?? Something isn't adding up.

my watch is totally ok now.

I drain the battery by "accident", it stuck in the apple logo for days (that's may be the "BIOS" of the watch, not the OS of the watch), so that drain the battery without OS8.x.

After it drain up, I put it back to charger (assume that start from 0% of battery or close to 0%), it go to OS, so that the it record the whole charging cycle from 0% to 100%, then, now I can use the watch normally.

================

(by my guess)

The problem of user facing now, is the "display of battery level" are totally wrong after you have upgrade to watchOS 8.x. It "loop" in the last "empty" battery level as it think that is 100% (like my problem at beginning, use 36% of battery and it dead on 64%. Although it display from 100% down to 64% then dead. But it actually only have physically 36% of battery charged, and then it really run out of battery and sudden dead)

I guess in this way because the next time I try (un-re-pair), then the watch only can work 9% battery (from 100% down to 91%, then dead)

while 36% can use around 4 hours

9% can use less then 2 hours

it kind of make sense of the battery % vs using time.......

so that I guess the battery has no problem, and that should be the "battery calibration" code in the watchOS8.x problem.

=======

So if you just drain your watch after you have upgrade to watchOS8.x, it didn't work, because the OS has already using wrong way in calculation, and it just a loop to loop problem no matter how you un-re-pair your watch.

I just lucky can drain the watch while in the "non-OS" status (I guess), so that it fixed by accident.

I have tried the unpairing and pairing. I have tried erasing my watch as new. The only time it lasted as it should for one day was when I updated to WatchOS 8.1.

So yours worked with this unpair/pair method? How many attempts did you do before it works?