Stock battery and run from no signal to about 3 bars around the house. I am in a remote area and am on the very edge of 3G. In a few spots the signal drops and on others it jumps down to 1x.
I have no problem getting about 48 hours of stanby if I don't toucht he phone, and about 24 hours if I use it normally. That is with data on, 2 email accounts set to push and no battery apps or anything like that.
Make sure you are keeping GPS/bluetooth/wifi/4G off when you are not using them. Just get a toggle toolbar like Power Toggles to put on your home screen.
Also make sure there is nothing installed that is keeping a wake lock and preventing the phone from going to deep sleep. Mine gets uninterrupted deep sleep on the battery info except for when push emails come in, then it shows a small spot where it woke.