This is where this phone will destroy any other phone right now. I got my iPhone 4 yesterday at 10:30 am and it was charged 100% I initially always use my electronic devices battery until it's empty. So far I have not been able to kill the battery. I have watched a 2 hour movie, surfed the Internet for about 6 hours, downloaded 10 games and apps, had 5 5 minute phone calls, the brightness has been turned all the way up, wifi and 3 g running constantly. AND the phone still has 30% battery power left 29 hours later. My nexus one wouldn't last 14 hours with really light use.