I just got the 9 cell off ebay and it works great, I payed $70 for it including shipping. So it wasnt a huge $$ to spend, I think it was worth it. I got my 6 cell for a backup when traveling and if I find I am not using it enough, I will sell it, seen them go for $40 on ebay. That maybe a way you want to go as well, to have 2-6 cell batteries for a little cheaper. If you have the money, the 9 cell is worth it.