Westin 47-3800 Dual Battery System HELPING HAND: Off-roading can take a serious toll on batteries, so carrying an extra is a safe bet. This system makes sure you take advantage of the available power. INCLUDED: All wiring, mounting hardware, and switches are included with this kit! RATING: This system is rated at 250 amps. REGULATOR: The dual battery system regulates the voltage across the connected batteries. SAFETY: The system has a manual override feature and built-in safety protection.