The Dynatron starter works very well on 24volts. You can get A couple of 12 volt jell cells free if you ask real nice at any of the companies that replace the safty lights in buildings, they have to replace them often in Hospitals and they usually just toss them. Jaka, Lipo cells cost A bunch and most of us have 12 volt chargers already. I have used the large starters with the Lipo batteries and like them A lot, I just can't see spending all that money just to start an engine.