8 hours running and 22% battery left

Thanks. That kind of info is great to have.

I'm doing a trail 50k in February and will have a very similar setup on my watch. Since I'm planning on being under 7 hours I wasn't worried about battery life, but knowing that it should be good for that and then some is good to know.

Yep, that's about spot on what I get too. I have about 10% battery usage every hour with the GPS going.

Excellent - I felt pretty comfortable that I'd have no issues for my 50 miler next year, but glad to know (I certainly know my Apple Watch wouldn't make it :) )

I've gotten similar results.

With 1 second recording and GPS & Glonass and HR alerts (no cellphone), I went around 10 hours with probably 4% left on a 12 hour endurance race. I did my last lap without the watch, but was really impressed.

I get about 11 hours from full with GPS & Heart Rate on, Bluetooth off, glonass off.
I get 15+ hours from full with just plain GPS and everything else off.
And one race I used a handheld charger to start recharging at the 10 hour 47 minute mark. It took 3 hours to go from about 5% to full (it does turn off the HR monitor when you charge while in use) to 100% again. From there I was able to get to the 25 hour mark and recharged the watch again while I took a 3 hour nap. In all I got a 115 mile continuous track spanning just under 34 hours.

Not bad!

I get 15+ hours from full with just plain GPS and everything else off.

...It took 3 hours to go from about 5% to full (it does turn off the HR monitor when you charge while in use) to 100% again.

Nice!! Good to know as I'm nowhere near a fast runner so I need to keep that in mind when I participate in the 100K event next year.

Thanks!

I'm curious about the effect of using a chest monitor instead of the wrist monitor.

Just guessing but suspect that the wrist monitor uses just a bit more "juice" than the chest monitor. However it is an RF link so there will be some impact on battery life.