Hike! - A few things to keep in mind: Overly complicated electrical systems = trouble. Charging batteries between rounds is NOT for door slammers. Find out what your ignition system likes is key. Ever wonder what your ignition system is seeing at the end of a run if you need to charge your battery when you get back to the pits?? Things that were ment to run between 13.8 and 14.2 volts ( lights, electric motors, solonoids, relays, batteries,etc.) will have a shortened life span if you try to run them out of their design parameters.