No hurry on my part. Just today, my 4S was fully charged at 7:00. I used it to listen to music, read a bit with the Kindle app, send and receive texts throughout the day, play a bit of Angry Birds, random web surfing here and there, a few phone calls... and my office has been previously established to have rather spotty reception regardless of phone or carrier. It's now 16:23, and the battery is still at 86%. The only service... location, radio, or otherwise that I have turned off is bluetooth.
Clearly I'm one of the lucky ones... I still charge every day regardless, but those limits definitely aren't being tested.