Here is a couple screens from my EVO. When it warns you to plug in the phone it also has a button to check usage that is built into the phone. Wish somone could build an app directly to this. As the battery was draining (almost dead) I left this screen up (waiting for it to die) total of 13hrs and 20+ min. It does not use any battery to check this. Look at how long it has been unplugged. The BT, Sprint Nav and Beautiful widgets never get killed by my task killer because these are a must for my job. I am a Professional Driver of 21 years and these are needed.