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High current relays are the most reliable and efficient way to add secondary batteries to your system. Using an isolator when adding a second battery will keep the batteries from discharging each other and allow you to run accessories from the secondary battery without draining the primary battery for safe starting. After the Stinger 80 Amp Relay and Isolator is installed per instructions, the 2 batteries are automatically connected when the vehicle is started and running and disconnected when the vehicle is off.
80 amps constant, 150a amps peak
Compatible with all types of alternators and charging systems
Prevents primary battery discharge
Maximum current transfer
Ideal for second audio battery isolation from vehicle systems
Water-resistant black phenolic plastic
100,000 mechanical cycle life