Duratrax ICE. To properly peak charge 12 cell I believe you'll need a 15v power supply. I may be wrong, but to peak a pak @14.4v your charger needs to see or exceed that amount. Maybe someone can confirm this. My Millenium Pro said this in the directions I think.
-Tamiya TA05-R - Tamiya M05 - Summit Raceway Ft. Wayne, IN