Same reason for me also for the change. My last phone was a EVO and the battery life on regular use was only 7-9 hours. When I did use it for games or watching a few short vids the life would be quartered. Even purchased the 3400 batt for the extended life but I just made it a brick I carried around. What's that bulge in your pants. Oh it's just my massive phone... As long as I don't have the GPS on all the time and have my iPhone 3GS check my emails once a hour my phone lasts all day.