Thanks. Should have known not to trust a battery vendor's page touting its superior cold cranking amps for a hybrid. Though for the hybrid battery pack, you'd w

Thanks. Should have known not to trust a battery vendor's page touting its superior cold cranking amps for a hybrid. Though for the hybrid battery pack, you'd want to stick with more traditional batteries. Supercapacitors are better when you need to provide a lot of current at once, but they don't have nearly the energy density of lithium, or even lead, batteries. It is possible, though, that a supercapacitor bank could be useful in the frontend to serve much like this battery does. I could see it being potentially useful to have the supercapacitor get the motors turning to provide torque as fast as possible, with the regular batteries providing the lower current to keep things going.