My AW5 battery life was great until I downloaded WatchOS 6.1.1beta Tuesday. Now it suddenly goes to red after just less than 5 hours. After unpairing and setting up as new again yesterday, here are my percentages: 3 pm 100%
4pm 93%, 5pm 88%, 6pm 83%, 6:50pm - RED lightning bolt. I Did File a radar.
Are you on a iOS beta as well? I seem to be getting slightly worse battery on my watch since I downloaded 6.2.2 on my phone. It might still be too early to tell weather it will stabilize or not but Im down to 88% with 2:39h standby and 41min usage.
I ask about the beta because Im still on 6.1 on my watch and the only thing thats changed is the higher OS version on my phone. My usage has remained the same.