So just went for a run with only my new Series 3 SS watch and my AirPods. Did about 90 minutes run, with music, GPS and Heart rate. My battery only went down 30% for that ...incredibly impressive IMHO! My only issue was some drops of audio during the run. had the same issue when I first got the AirPods, I am assuming this will be fixed with a software update at some point.
Overall very happy!
Overall very happy!