I too have the same problem as beall_endall above. I have a Galaxy Gear S3 frontier, that used to last 1-2 days between charges. I have had it paired in the past to an S9 with no problems, then switched to a Huawei p30 pro for the past year. And it is only been the last few weeks that this problem has occurred.
I have tried disabling wifi, and other things and that doesn't fix it.
CURRENT WORKAROUND: What I have found does work is disabling notifications from within the Gear app. When I re-enable the notifications, every couple of days, the watch will drain a 100% battery within about 4 hours. And when I look at the Gear app it shows it is disconnected. Now what is very strange is that the watch still says "connected by bluetooth", and even looking at the Bluetooth settings on my phone, it says connected to watch "For calls". So there is a connection, but obviously not a complete one.
Now this workaround is pretty awful, because without notifications, the watch is barely a smart watch. It also means I am constantly checking my watch's battery throughout the day to make sure it is connected properly (by opening up the Gear app) so my watch doesn't die on me.
As a side note, I am aware of the P30 and how it manages applications (it is very good on battery because it tends to automatically close applications to preserve battery). I have already disabled the auto-closing feature on the phone, so it is not that. Also, the watch has worked flawlessly for a year. This is something new. I am not sure if there was a Gear saftware update (I dont remember a watch firmware update recently), because most of my apps auto update. I don't know how to look back and see when the app was updated on the phone either.
