I am a new Garmin user and decided to buy the Vivoactive 4S after such a disappointing experience with Fitbit's Charge 4. The Vivoactive 4S is very expensive (over $500 CAD with tax) so I expect the watch battery to last up to 7 days in smartwatch mode as advertised.
I started wearing the watch on Tuesday Sept 8th when it arrived. I charged it when I got it but I don't remember if I charged it to 100%. Anyway, from Tuesday to Saturday at 5 pm (almost 5 full days) I have worked out with the watch twice and the battery was only at like 20% or so (i never used GPS to workout and I don't ever plan to). On Saturday around 5 pm since my watch was around 20% I decided to charge my watch to 100%. It only took under and hour to charge and I was next to it at my desk the whole time, so I didn't leave it overcharging for that long at all.
I didn't check what my battery life was like when I went to bed Saturday night, but the next morning (today) I was woken up at 7:30 am with a notification that my watch was only at 10% battery. I have no idea why it drained so much overnight. I didn't change anything about my watch's settings on Saturday. Pulse Ox and Wifi are NOT on for my watch (Pulse Ox isn't' even installed on it).
I have no idea what happened to my watch overnight and I am worried it is defective. I did play around with some watch faces at the IQ Store on Wednesday but I ended up uninstalling watch faces I downloaded and I use one already supplied in the watch from Garmin. I would be skeptical that adjusting the watch faces is the problem though, because I did that literally on the second day I wore the watch and the battery life continued to be good until Saturday.
I still have 15 days to return it for a refund and given how expensive it is I may do so if I can't get the battery life to improve. Does anyone have any tips on what I can try? Thank you.