i've done some extensive research on the advanced task killer app
and i hear many, many, goods, and many bads about it.
i havent had it for a while and honeslty my battery is doing better than it did before with it...
not sure what everyone else thinks but im not sure if i should get it again or not. also, i hear it creates a lot of problems too on phones, i had it on my old droid and my old droid have many problems and issues technically with it and ended up having to get a new one. im not sure what the problem was but im not trying to risk it again.