[mglucido]

Thanks to all for the great ideas. In the end I found converters capable of the output of the 12V battery to be VERY expensive. Suddenly, lugging around a 12V battery seems reasonable. I think we'll wire the system up for a 12V DC cell and convert over to a converter source if the programmers can use it without the more powerful DC motors. The servo idea is particularly interesting. Thanks again, Michael