I know it's kind of a silly question, but what app or task kills the battery the fastest? I have a MAXX and I want to drain the battery rapidly so that the OS will "calibrate" the battery meter. I've had the screen on 100% brightness, screen always on, for about an hour, and it's only gone down about 4% (currently at 64%). Looking for something that the phone can do by itself without my constant attention. To clarify, I'm trying to get the battery meter to calibrate. I understand the the lithium batteries do not require conditioning.