Relaxn 53083 Voltage Sensitive Relay 12 Volt Relaxn 53083 Voltage Sensitive Relay 12 Volt Ideal for dual battery systems or to switch high current appliances. Suits ATV, boats, RV's, marine vehicle, caravan and trucks. VSR allows 2 batteries to be charged at the same time. No voltage... MSRP: Was: Now: $73.50 Add to Cart