Hi all, had my upgrade last week and I have found the battery drain on this new 4 is poor and my 3 lasted nearly a week. I use it for time, alarms, notifications, health sensors and music controls. As I wear the watch to bed I need to have down time to charge it before I go to bed.
I did a watch reset and the battery is working well now.
Be sure to backup your watch data before reset. Note that you will need to redownload all the watch apps and reconfigure some settings so it will be quite troublesome.
I think in the future we have to stop auto update of the wearable app as I read it somewhere in the forum other users face the same problem even for the older models too.
Not sure why Samsung isn't looking into the issue