Originally posted by igo4bmx
why would you wanna waste money on another battery?
upgrade your alternator for more amps for your system
A good reason to have a separate battery for your system is if you are running a high power/high current system and would rather have a dedicated power source for your system so you aren't pulling power from the electrical system for the rest of the car. Another battery by itself would't be wise, best to do battery, hi output alternator and stiffening cap.