Battery Isolators
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Battery Isolators Ensure reliable engine starts Product description: Battery isolators prevent auxiliary batteries from draining main battery power in vehicle electrical systems. Battery isolators, designed by Sure Power, help prevent multi-battery drain by isolating the main battery from an auxiliary battery. Using solid-state technology, the isolator acts as a check valve between the two to direct current. This isolation helps extend battery life by allowing each to charge and discharge according to need. Suited for light truck, RV, select commercial and marine applications. Easily connects alternator to one main and one auxiliary battery. Includes wiring and hardware for basic installation; an optional installation kit is available for advanced installation. Bussmann is now a part of Eaton. Same great products plus even more. Learn more at www.eaton.com/cooper.

Why batteries need isolating Multiple batteries are often connected in an electrical system - one to start the engine and another to power accessories. This can become a problem when a fully charged battery is connected to a partially discharged or dead battery. The current in the fully charged battery will flow to the less charged battery, until both reach a common charge level, or even worse, discharge completely. Regardless of how many batteries are available, this current flow from one battery to another will continue until all batteries in the electrical system reach the same charge...