Well, these battery apps are pretty 'useless' in my experience - yes, information is given as to what times remain to do certain tasks, e.g. playing music, watching movies, etc. Now, when closed (although remaining in the multi-task screen), I really doubt that there is any substantial impact on battery life at least in the two that I suggested. When initially obtaining these apps, I was hoping that more information would be provided on 'battery health' (i.e. full cycles remaining for charging - which is easily obtainable on my MBPro w/ an app); I exchanged a few emails w/ one of the developers of an iPad battery app I was using - apparently, iOS does not allow monitoring of this information which would be useful for an 'aging' iDevice. SO, my bottom line is that I doubt these really 'run' in the background, unlikely use battery power when listed in the multi-task screen, and are pretty much of no value - BUT, just my 2 cents. Dave