Well, one of these days when somebody's battery runs down in 2 hours and they can't make a phone call, you folks saying task managers aren't needed and shouldn't be on the phone are gonna have to answer for it.
Its a grey area, and it would behoove you to learn more about how your phone reacts to the killing of tasks, and realize, that only in a perfect world does every app behave as its supposed to, and not sit in the background burning cpu cycles. This in the end kills the battery and performance.
Here is my take on it.
http://www.droidforums.net/forum/dr...t-battery-life-tips-reasons-4.html#post467042
Plain and simple. If your battery runs down in 2 hours you are running bad apps, a bad ROM, bad kernel or a combination of all 3. It is well known at this point by folks that spent the time and money to test all these auto task killers and process killers, etc... that they have absolutely NO positive effect AT ALL on usability or battery life. These tests were done over a period of time repeating the same tasks and usage time over and over to ensure consistent results. I can say with a clear conscience and complete honesty that Auto Task Killers/process killers have absolutely no effect on a device that is running PROPERLY.
The key here is that the ROM, Kernel and applications are all working properly and playing nicely. If there is one or more bad apps then the task killers are treating the symptom and not the cause. In that case the battery life may increase from what it was but is still not what is should be as the the errant app/apps will restart again and again ad nauseum due to the task killer killing it.
A perfect example of an app that went errant recently was SetCPU. Now this app is a good app when working PROPERLY but the fact that it was discovered in version 1.52 to not only reduce battery but cause excessive heat as well. Now folks didn't remove SetCPU because they needed it. Had they known initially and removed it they would have had reduced temps and better battery. Now with SetCPU v1.51a and the latest update things are back to normal and it is working properly.
Again this is just one example of how a bad app can really muck with the system causing folks that use Auto Task/Process killers to have a placebo effect of better battery life. When in all reality if the root of the cause is traced down and removed and/or fixed the need for this crutch would no longer be necessary as cited in the above example.