955 vs 255 battery life difference

so i guess you are not using your watches for some hiit training etc, obviously if you will use your watch for every-every other day runs you will get big usage time by one charge, but if you will do every day runs for the same 60 minutes you will cut your battery life to 7-10 days.

Do check the GPS mode on both watches. Me and my wife use "GPS only" and with a course file loaded, the burn rate is very close

I, for example, have been documenting my range days and satellite hours since I bought the 955 Solar at the end of January and, based on this self compiled data, my range is about 17-20 days with 8-10 hours of "GPS only" running activities.

do you wear them while sleeping? Is pulse ox measurement on? do you do any other type of activites, for example hiit or gym workouts?

Yes, I wear it 24/7.

No pulse ox since the first day. Only running activities.

And phone is always connected to watches?   

thanks alot :)