I have only had my Evo for a little over a week. I unplugged this morning at 9:30, here it is 7:15 and I have 65% battery left. I have been texting and angry birding etc all day. Used it on a field trip this weekend and took 150 pics over 3 days and the lowest the battery got was 20% by 9pm and that was taking it off charge at 7am. Not bad at all.
Unplugged at 6:30am and it's 8:04 and I'm down to 88% already with a few texts and no calls.