No, no go straight to your local hardware/tool store and order a Black @ Decker 24 volt nicd drill battery pack, This pack is already made and provides the optimum voltage for the Dynatron to provide awsome performance. The Nicd cells have the ability to give up a lot of current without damage Also they are not seriously affected by deep discharge which is why I shy away lipo's for starters. This becomes very important when your starter is the most popular on the flight line.

I love my Dynatrons and have two one is direct drive and I can alternate between a one inch cup as well as a quickly removable two inch cup. The other has my home maid gear drive and this one has a three inch cup. It depends on what I am flying as to which I will use and for the smaller stuff I will use the 18 volt black and decker drill battery but the geared starter with the 24 volt battery has no problem with my OO 55GT and my G-62. The direct drive Dynatron with the 24 volt Black and Decker has not problem at all with my OS 33.

John