i am wondering if i should get the 4 cell or 8 cell battery for my dell 710m laptop. i know the 8 cell battery would last longer but how many more hours than the 4cell one?
and the 8 cell battery will be more heavier. i don't wish to carry a laptop that's too heavy especially when it's small and it suppose to feel light.

does anyone know what's the weight difference between the 4cell and 8 cell battery?