I put 40% in "18-hour battery" sticky poll because it's at least that on my 42mm SS after one day. I wanted to share with larger audience due to concern by so many for battery life. Obviously, battery life will vary with the owner/user/wearer and their activities/notification burden, etc.
In all instances, I'm keeping the Activity monitoring on at all times, brightness for screen set at midpoint. I find the Awatch on power reserve uses less than 1 percent batt life per hour; if not on reserve, just setting in box without charger, uses about 2 percent per hour. The draw on battery from the iPhone BT connection appears nominal.
In the big picture, I'm easily going 24 hours of use+standby, specifically as follows Sunday through Tuesday:
4/26-27: 24 hours WIFI & BT except overnight. (no diagnostic because repaired)
4/26 14 hours worn, taken off with 47 percent battery available
5.5 percent used during reserve overnight, unlocked with 43 percent batt
4/27 10 hours worn watch down to 6% fully operational WF BT (did not put on reserve when prompted)
4/28 put on wrist at 6 a.m.
11 am iPhone 6-plus 96% battery left, including a few web page reads
1:30 78% phone after several web pages reads
11 am Awatch 84% after using timer for three 10-minute presentations, other notifications
1:30 78% using timer for two 10-minute presentations, other notifications
7:54pm end of day started at about 6 a.m.
Batt aw 57%
Batt ph 79%
Watch diagnostics
Usage 2 hours:31 minutes
Standby 13 hours:57 minutes
In all instances, I'm keeping the Activity monitoring on at all times, brightness for screen set at midpoint. I find the Awatch on power reserve uses less than 1 percent batt life per hour; if not on reserve, just setting in box without charger, uses about 2 percent per hour. The draw on battery from the iPhone BT connection appears nominal.
In the big picture, I'm easily going 24 hours of use+standby, specifically as follows Sunday through Tuesday:
4/26-27: 24 hours WIFI & BT except overnight. (no diagnostic because repaired)
4/26 14 hours worn, taken off with 47 percent battery available
5.5 percent used during reserve overnight, unlocked with 43 percent batt
4/27 10 hours worn watch down to 6% fully operational WF BT (did not put on reserve when prompted)
4/28 put on wrist at 6 a.m.
11 am iPhone 6-plus 96% battery left, including a few web page reads
1:30 78% phone after several web pages reads
11 am Awatch 84% after using timer for three 10-minute presentations, other notifications
1:30 78% using timer for two 10-minute presentations, other notifications
7:54pm end of day started at about 6 a.m.
Batt aw 57%
Batt ph 79%
Watch diagnostics
Usage 2 hours:31 minutes
Standby 13 hours:57 minutes