12V 140Amp Smart Waterproof Dual Battery Isolator Fits ATV UTV 4WD RZR RV Car Watercraft Marine Boat Truck Caravan Camping(UTVR2140B)

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✔ Safety Protection: The protective design of this battery isolator sustains surge protection,over voltage protection and over current protection.
✔ Efficiency Charging: AOPEC battery isolator can distribute the charger or alternator current effectively between two batteries.AOPEC battery isolator connects both batteries during charging and keeps them isolated when discharging.The light will be off when the voltage is less than 12.8V, and to ensure there is enough power to start the vehicle.