Voltage-Sensitive Relay Kit (can be used with Hardkorr Battery Box
$ 2.50 · 4.7 (226) · In stock
Using a Hardkorr battery box with voltage-sensitive relay (VSR) is the simplest way to create a dual battery setup in your vehicle. The VSR acts as an isolator, allowing the auxiliary battery (inside the box) to charge directly from the crank battery while the car is running. Note: Not suitable for Lithium Batteries.
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