Same issue, battery life is ***** on 21 ultra now and battery life on watch 4 classic has gone from 3 days to less than 12 hours... the watch is only a couple of months old...
Hello All. Have a look at Samsung Good Guardians, the Battery Tracker and Battery Guardian have some good indicators of what's using your battery and restricting background use on apps you don't use often.
I cannot see any difference in the upgrade at all. I am not sure if my battery is worse or I have used it more this week, but there is nothing special about this update!