XDA member, virgilp wrote a useful Windows Mobile application ~ Screen Off. This application simply turns off the screen on the device, without putting it to sleep. He uses it to save battery when connect to his phone to the PC to sync or to copy large amount of data. Isn’t that useful for battery eater HTC HD2?

Note – Some programs, usually media players, use a backlight keep-alive feature. Be sure to turn off this feature in order for the Screen Off application to work.

Download Screen Off for Windows Mobile here.