I've read many threads on task killers. I myself knew nothing about them before I got my phone. Like many others, the actual manager of the VZ store downloaded advanced task killer to my phone. Yes, I've heard from others that VZ reps don't know anything...blah blah... but logically, if using task killers is so bad, you'd think that a tech at VZ (they can't ALL be idiots) or someone at HTC would be putting out a company-wide memo to not only stop downloading task killers to customers' phones, but to not even endorse them at all. So, I have read in the the threads over and over to "let the OS run like it's supposed to.." and "the Incredible will close programs itself..." but here are a few questions I have. 1) I haven't read a worst case scenario yet as to what "bad things" can happen to your phone if you use a task killer. Instead of saying "don't use them," can you give me some proven examples of horrible things that can happen to the phone? 2) I have read threads stating that some things that are listed in a task killer's list of currently running apps/programs aren't necessarily using up battery, they're just open. After rebooting my phone, I opened advanced task killer and saw a TON of stuff open or running (at least according to advanced task killer) - FM Radio, Notes, YouTube, Clock, Calendar, Footprints, Gmail (I don't use), Voice Dialer, Market. HOWEVER, when I go to Settings to see what is actually pulling juice from the battery, none of these are listed...unless they are covered under the "android system" listing. After some time, everything I mentioned was still listed as open or running under advanced task killer - if the Incredible is supposed to maintain itself and close things that shouldn't be open, then why are all these things still on? IMHO, there is not a doubt in my mind that using advanced task killer has saved batter life - nobody can tell me different. Maybe it varies with other folks using it and results might vary. Whether using the app is good or bad, that is the point of this thread. So.. convince me I shouldn't use it anymore.