I am going to see if I can get a decently matched pack of 14 cells (A123) from the 21 cells that I have. I had to buy another dewalt pack because I charged (by accident) the 7.2v part of the pack on the 18v setting.... idiot. If you never saw what happened Finnster, check
HERE
I say I want to get the most alike (matched) cells because I hate balancing.... more over, when there is only a small difference between cells, the balance does not get any worse because of the LiNP chemistry (you may know).