I am still quite new on these forums and have read so many things regarding task killers. I have been under the impression that have have not been necessary since android 2.2 I recently purchased this phone and noticed Samsung has their own app loaded into the phone for killing tasks. So this got me thinking are they necessary? I recently tested out Mobo task killer and noticed many discrepancies with apps that were running. The Samsung app said none were running and the mobo version listed quite a few. Should we be using these? Also is juice defender really able to help get some more out of ur battery life with this phone?