There are several Task Killers on the Market. -Advanced Task Manager -Advanced Task Killer -Automatic Task Killer -Super Task Killer 2011 -Watchdog Task Manager -Taskiller Free ....Just to name a few on the top of my head. What are the differences between all these task killers? which one is best? I also have heard that having a task killer installed burns up battery life faster just because it is always running in the background, which defeats the purpose of installing a task killer to get better battery life in the first place. What are your thoughts on these?