I was jw if theres a big diff bc the one I have for my inpiron 6400 is shot to only being able to run w/out a battery for 20 minutes-ish and i want a battery that will last long and not turn out like my battery so is there a big diff between the 85 WHr 9-Cell Smart Lithium-Ion and the 6-cell ones
it all depends on what your sys specs are really...brightness, is wi-fi enabled, how many programs are you running...that kinda stuff