Once a day is normal, I wouldn't call it bad. Wear it during waking hours then charge it overnight. There are things that you can do to eek out some extra life (Google is your friend), but in general, a day's use is all it was ever meant to give. Yes, exercise tracking (with the heart monitor on) will kill it. If you do a lot of exercising, either turn off the built in heart monitor during activity (see watch settings) or get an external blue tooth heart monitor to extend the watch's battery life.