I notice battery drain during night. From 52% till 26%. I did a reset after the latest update.
Aod off, lowest brightness setting, pulse ox off
It looks like the same drain as with the 255/955 when they launched
The specs don't lie. 20h GPS and 13 days with gesture mode. But if you run 4 times in the week it's enough for more then one week of battery life. You'll get the amoled screen, new interface, training readiness. In my country you can order the watch, use it for 3 weeks before you pay. Maybe you can find a store that offer the same so you can try it. But be careful with it haha
Install this for a clearer view on what's happening:
Can you complete a Spotify "Update downloads" to 100% without an error? I was dropping percentages like you until I completed a sync - maybe it was trying in the background, even with wifi turned off.