Ive gotten 8 days and still had 10% left. that is with only recieving notifications and checking the time periodically. And monitoring sleep every night
I noticed that since the last update, I am getting better battery life.
It's been exacty 4 days 2 horus since I charged it and it is now saying 48% left.
However I don't have it paired to my cellphone, only if I need to transfer watch faces, it is always traking my steps. wake up gesture is off and brightness set to 5
2,5 days with very intensive using: sleep monitoring, exercise monitoring, many notifications (calls, viber, whats up, many reminders).
I consider it as quite acceptable.
The only things that really burns through the battery is the Endomondo app, but it keeps the screen on for hours. I use the Bluetooth hrm for two or three hours at a time. I just charge the watch when I get home.