I had to send in my watch in right after the 2.1 update due to battery life issues. I reset/unpaired 3 times and the issue was present. has had my watch for about a week now.
I did it since 1st day it's been released.
No issues at all
Well that's great to hear! I googled "2.1 and battery drain" and I'm not the only one having this problem. So I'm just giving everyone a heads up. Like my battery would probably last 4-5 hours on a full charge. I do listen to music on my iPhone at work. This other watch owner said he thinks that the watch is acting like its also playing the music which could be leading to the issue.
I did it since 1st day it's been released.
No issues at all
Might it possible you installed an app which drains battery. Maybe cause of its settings.
I'm just guessing cause I found hard to believe in os bug.