I run no alt, but have 2 red tops. I have made 11 passes in one day before putting a charger on it, including cooling down and cranking up at trailer and 3 or 4 times in the staging lanes. Now that I think about it, I had to swap a battery out before semi finals that nite, but I was running two classes. 1/8 mile, MSD 7AL2, line locks ect.
Brian