Brian,

Being that you want to charge lipo's that have no more than 3 cells, the Hobbico Accu-Cycle Elite would be perfect for you. It has dual outputs.

I got a little 12v battery that I hook up to it to charge my batts on the way to the field or at the field.. No problems......

But, here's what I do. I fly a mix of Lipo's and NiMh's. I'll charge the Lipo's at home the night before I go flying. They don't lose a charge over a 24 hour period. Then either in the morning before I leave the house or on the way to the field, I'll charge the Nimh in my car...............Then field charge both at the field when they run out of power.