Apple watch 4 battery drain when connected to AirPod Pro & using Fitness app, without iPhone
This is a recurring problem. The watch battery drains from 100% to <10% within 30 min of using the Fitness app while connected to a pair of Bluetooth headphones. Without an iPhone in sight.
This was fixed a few months ago when I had a problem with the BT connectivity with Bose Soundsport Free via AppleWatch exchange (mailed it in and got another one back)
I am not using AirPod Pro, and the problem has come back.
It occurs only when I listen to music/podcast, use the Fitness App, and no iPhone in BT's range. It seems like the problem occurs when I notice that I have problems controlling the volume through the watch.
This is really frustrating. Ready to toss out the AirPods!