This is for a Galaxy Watch 3 that I just bought when it first came out (August 8th, I believe). I had to send mine for repair. They changed the battery. It wasn't a software issue for me as I only had one software update after I got it and it worked perfectly fine for two weeks, until it started draining quickly overnight that it didn't even record my sleep score (I suspect it drained within 2 hours of full charge).
I just bought my 2nd one too and it came with the latest update but its stays less than 48 2 days!
I remember my x one was staying at least for 3.5 days seems the last update has a bug or samsung meant that! :/
I have started noticing same problem with my Galaxy Watch Active 2. Today the battery died within 5 hours (no sports, GPS tracking, calls etc.). It used to easily last for 1.5 to 2 days. Something messed up with recent update.
No reply yet from support. I've tried all the suggestions about re-starting and re-pairing as well as a factory reset. I have gotten a few more hours out of it for a little while but no where near what it used to be like.
I am having the same problem since the August update
Make all of the changes to switch things off etc but no better
But why should I have to do this I bought a watch with features I wanted why should I have to turn everything off just because Samsung messed up their update
I am in the UK so will be phoning Samsung UK support this week and give them an opportunity to fix this under warranty or replace the phone
If they won't or don't sort it then I will be making a UK small claims court claim to get my money back
I have 2 galxy watches. The 46m and the 42m. I have then connected to a s9+ and s s10+ and both watches are draining really fast. I have been having the issue, but I turned off mobile data and it seemed to get more battery. Turned it back on yesterday and I only got about 8 hours out the 46m. Please do something samsung.