My New Rezound when I had the power mode in High performance I was burning up the battery playing a movie in 4G. I found that if I set the Power Mode to Economy Mode it kept the Phone in 3G and the battery life was great. Now I only boost to 4G when I actually need to download something. To access this feature on the Home screen push the Menu Button and tap settings. Go down to Power and open it up. The very top says Power Mode, adjust your Phone settings from High Performance, to Normal or Economy mode to maximize performance.
Thanks for the tip about the battery life however when I open up the Power icon, I do not have Power Mode, it just shows Power, Battery Status, Battery Level, Battery Use, then Fast Boot. The only thing clickable is Battery Use and fast Boot.
Any help on this would be greatly appreciated.