I was looking at buying a C12 after I sell of my 36v drill. I really overbought with that one. However, I was wondering if I should for a possible lithium ion version that maybe coming out soon? Also why does Festool use NiCd in the 1.3 and 2.4, but NiMH in the 3.0 aH batteries? Is there really that big a difference? From what I read I thought that NiCd was better.