The CD3 uses AAA designed for the MTX-3.
If you are saying that the CD3 runs on AA batteries, you've never seen one. I've bought AA batteries ever since I've owned it (6 months) and that is what the instructions call for.
Well, the auction is over, and I now have a 5 cell hump pack on it's way. I'm just taking a chance I guess. Now I just need to buy a charger for it. Anyone know where to get an inexpensive charger?