My Apple Watch's battery is stuck at 100% and suddenly turns off in 5-6 hours

Your report suggests a battery problem, but it needs proper diagnosis by Apple to be sure. Contact Apple Support for more information.

A simple battery service even out of warranty should be about $79 according to watch Service Pricing - Apple Support

I have had an entirely similar experience over the last few days with my Series 2 st/steel watch and have tried everything as per Matt's testimony. I had resigned myself to thinking my watch has a battery issue, but after reading this topic am left wondering if this is more than a coincidence and there is another possible cause?

TIA, Roger

I have the same issue. Watch series 2 Nike is fully charged and will stay at 100% for a long time then discharges quickly and at about 70% it dies. The only way to turn it on is to put it on the charger and then it dies the red flat battery on the screen after charging for about a minute the watch reboots and the battery percentage is about 70%.

I live in South Africa and went to the iStore which is just a reseller. Their response is that it is out of warranty and that if they send it to their repair dept they will not repair it but with replace it at the full cost of a new watch. I was told that they do not replace batteries.

The support for Apple products in South Africa is horrible but Apple do not seem to care.

UPDATE! I found another topic in which the owner returned his watch to normal charging functionality after subjecting it to a spell of 15 minutes in his freezer!

Whilst it may be premature to say so, this seems to have fixed my problem too!! After removal from the freezer I put the watch on my charging pad after about a 5 minute wait, it then displayed the Apple logo followed by the connect cable graphic. After that disappeared it did nothing for about 10 minutes until it then started up with the Apple logo again. Eventually it displayed the time and the charging level, which was right down to about 2% and since then, it's been climbing as you would expect (currently at about 30%). The strange thing about this is that the date and time are now incorrect -- as I write this at 12:11 on Saturday 23rd March, the watch is displaying 16:07 on Wednesday 20th! Presumably this will correct itself when I reconnect it to my iPhone.

Hopefully this will work for you too ...

Rgds, Roger

I'm sorry to read this hasn't worked for you, Chris. It occurs to me now that at the time I put my watch in the freezer I had left it discharged for 4-5 days beforehand, i.e. not straight after earlier charging attempts. Also, I think I probably left it in my freezer for a good 30 minutes, not 15 as originally suggested. Whether these steps were critical to being successful I cannot say, but I suggest you give it another try.

I'm pleased to report that my watch has now been running for 30 hours since 'repair' and there's 46% charge remaining!

Miracles happen. After trying the freezer trick with no joy I did another refresh and decided that I would just have to replace the battery. I had to charge the watch 3 to 4 times a day to keep it from dying. The battery never showed less than 100%. Either 100 % or dead. After 3 to 4 days to my amazement I saw the battery indicator was showing 83% and it slowly went down as the day progressed. After that - it is working normally.

What made it change its mind and what was done to get it to work is a mystery.

https://discussions.apple.com/thread/8377655

Unfortunately no change for me. Thanks anyway

This might help.....https://www.imore.com/how-to-fix-apple-watch-battery-life-problems