When I got mine this past Monday morning at 7:30am I unboxed it, put it on the charger at 87% did the update and by the time it was done the watch was fully charged. I have been playing around with it, doing some normal things like Apple Pay, checking out the Wayfinder, listening to music pairing it with AirPods Pro 2, using it as a remote for my Apple TV, going for a brisk walk, and getting tons of notifications with always on display never turned off. Today is Wednesday it hasn't been on the charger since I took it off Monday. My watch percentage is at 27%. I will most likely put it on the charger tonight. For me I will use my S8 for my intense workouts. This Ultra is strictly for everyday wear. Love mine a lot! Haven't even thought about returning it. My favorite Apple product since the first watch and first iPhone. Hope every one is enjoying their watch.