I just got a S4 40MM on Saturday.
First day in the office, I'm down to 77%. Usage for watch shows:
Usage: 1hr, 26 mins
Standby: 5 hrs, 48 mins
I have raise to wake disabled, low brightness, turned off automatic workouts, etc.
This seems pretty poor, no?
So far from my experience and much of the consensus here is that the S3 would do up to three full days before needing to be recharged. With the S4 you lose an entire day. I just make it through the end of day two before it’s dead.