I have been using the phone for business use since Thursday. I have had no problem making it thru a day between charges. It seems to be getting better too with time as usual with these batteries.
My day includes a ton of talk time, a little bit of texting, numerous emails sent and received, and the snapping of a few good pictures.
You will be fine. I also use the Charge for business. I live in a 4G area running 1 exchange account (getting 100's of e-mails pushed per day), a gmail account, and an aol account. I'm texting constantly and receiving phone calls on a very regular basis.
You should have no problem making it through the day. Mine powers through fine with room to spare.