Don't think it will stick out any more but I bought the 6 cell battery.
To be honest I have never had a problem with battery life, mine has generally ran about 3-4 hours on normal performance and 2 hours on high performance (basically turning the backlight up) which is plenty for me. I imagine that the 9 cell will do 1.5* that so 4-6 hours on normal and 3 hours on high.








