Ok, thanks for that, but this is where i am sticking. Isn't a 2s2p pack actually 4 cells? OR do only the cells in series count? And if so, why not the cells in parallel? And do the cells in parallel get balanced also?
When a manufacturer says their balancer does 2 cell packs, do they actually mean any 2s pack?

I know this might seem obvious to some, but i don't want to go buy the wrong thing, so i am asking everything i can think of.