Well yeah it’s beta so you use at your own risk for sure. I usually never beta test watchOS but the official 11.0 release two weeks after my install on 16th started draing my AW Ultra 1 battery twice as fast as 10.x did which has been normal since I got my Ultra 1 year and half ago.
So I read that beta 2 of 11.1 still had drain but if by joining test I can tell apple about it and they will improve. So I reported beta 2 continued battery drain and it sent the phone/ipad and watch sysdignose files and with in hour it said known issue and lots of reports. When beta 3 dropped on Monday I installed and it has reduced the excess battery drain by 50 percent although still above the pre 11.0 official use I had on all the 10.x updates. So far I am not having the issues reported but hope it continues ok til beta 4
So I read that beta 2 of 11.1 still had drain but if by joining test I can tell apple about it and they will improve. So I reported beta 2 continued battery drain and it sent the phone/ipad and watch sysdignose files and with in hour it said known issue and lots of reports. When beta 3 dropped on Monday I installed and it has reduced the excess battery drain by 50 percent although still above the pre 11.0 official use I had on all the 10.x updates. So far I am not having the issues reported but hope it continues ok til beta 4