I thought that the same-when I started reading all these posts about battery issue. Maybe I did, I do not know--however, I did do the reset as some members mentioned, and it seemed to go back to the normal battery life I was used to prior to the update. I used it quite a bit Sunday-most of the day, Monday night and Tuesday night. On Wednesday, the battery was down to 7%. So I figured I would drain it to 0% since I had not done so this last month. Sure did take a lot of time to drain it down. In fact it took about 4 hours to drain my battery from 7% to 0% today, while playing music with the screen off.
I was very surprised about how long 7% goes with this use. I am sure, if was surfing the web or playing a movie-the battery would have drained quicker...though not sure.