I upgraded from S4 to S5 purely for the AOD, just because i was tired of the screen not always turning on when i wanted to look at it. It required odd wrist movements or tapping on the screen to wake it up.
I don't really use many 3rd party apps (I don't have auto install on), and I don't do workouts. Mainly as notification reading device, quick reply to text messages, and audio control when listening to music with airpods, due to lack of volume control on the airpods.
On S4, which was a huge battery improvement on my prior S0 & S3 watches, I was typically left with 70-75% battery at the end of my week day, where I typically put on my watch at 6:45am and typically put it on the charger at around 11pm. So that about 14 hours give or take. One time I forgot to take my watch charger, and it lasted an entire long weekend at the cottage. (3 days) with about 10% left when I got home.
With S5, my settings restored from S4 backup, its drastically less, betwen 35-45% at the end of the day, with the same usage pattern. I worry if I ever want to use some more features, It may not last thru the day or be very close.
I'll reserve further judgement after there is at least one WatchOS 6 update, perhaps battery drain will be addressed.
