dell 9 cell laptop battery

I bought the battery and found that Dell has built their computers to only accept Dell batteries. So, the battery would not recharge. The company was very nice to me and charged me 5$ to just call it even. I think it was a good idea as it would have just cost me that to mail it back to them. I now have a 9 cell laptop battery that does not work with my Dell computer. So, I am still back to square one.