This new state-of-the-art, fully automatic dual battery controller is suitable for any vehicle with an auxiliary battery. Smaller and lighter than other standard battery isolators, the Battery Doctor® Battery Isolator employs electronic switching control technology. Our high-performance electronic isolator allows you to charge two batteries from a single alternator, and keeps the starting battery isolated from the second battery. Also, with a single push of the override/reset button, you can change the batteries to parallel mode for jump starting.

• Priority charging for starting battery.
• Includes mounting bracket  that houses the 4"x4"x2" Isolator.
• Over current and surge protected for vehicles with electronic systems.
• Manual override for starting battery.
• Automatically charges auxiliary battery.