i have a speedotron power pack with 2 lights i believe they are 400w/s a piece. i haven't played with them in a while but i'm pretty sure it's the brown 400 series. i want to be able to play with them outside, but as far as i know speedotron doesn't make a battery pack. i have a car cigarette lighter converter. not one of those cheap ones, but a nice one that will charge it's own pack to 120v. can i use this.to power the speedotron. as far as i can tell there would be a surge to blow anything. the power pack should just charge and pop.