so, after a couple of weeks with the watch, i have to say i am very please with the battery life and thought i'd provide a couple of estimates (which people can either compare against their own watch or reference if they are thinking about buying the watch).
Conservatively, what i am finding is:
- ~5% per day (maybe a hair less than 5%), on days when there is 0 GPS activity tracking, but oHR always used (worn 24/7), notifications on for phone calls (but turned off for all other notifications. Watch faces: a mixture of connect IQ and standard analog face. and while Auto backlight has been turned off, i continue to play with the watch a lot and use the backlight at night.
- 4-5% per hour of GPS activity. (not sure it would quite make 24 hours but i think 20 hours is a pretty conservative expectation.
i'm very impressed and satisfied with this kind of battery performance. this bodes well for the future, even if the battery has "deteriorated some" 3-4 years down the road.