My gen I is basically worthless at this time. The day after the FW update the issue started. Pre-FW update, I could go all day and end with about 35% battery left (0700-2300 hours). Now? I put it on at 0700 and it's 100% dead no later than 1500. This is with being VERY careful to conserve battery by:
- Brightness to med/low
- All sounds off
- Only 2 complications on watch face (battery and weather)
- Uninstalled all 3rd party apps except Skype for Business
- Minimized all notifications except iMessage and Skype for Business (both of which I used before the update)