I goto car shows alot with my friend he has a tricked out accord..thing is he runs 2 12v pyramid power supplies and its a pain in the but to wire it everytime at indoor car shows..can i get a battery charger that will do the same or find a cheap 50 amp or higher power supply somewhere..any place i can get those supplies or chargers cheap?my friend would need at least a 50amp...thanks for the help in advance.