HULK 4X4 Dual Battery Isolators / Voltage Sensitive Relays have been specifically designed for a wide variety of 12V applications.
 
HULK 4X4 Dual Battery sense the input voltage generated and automatically connect/disconnect the appliance or circuit at pre-set voltages, eliminating the possibility of discharging the primary starting battery.
 
Constructed with a weatherproof body (IP65) and durable silver tipped contacts,
Dual Battery Isolators also feature surge protection and a L.E.D indicator designed to alert the user when the unit is engaged.
 
HULK 4X4 Dual Battery Isolators are ideal for dual battery set-ups as they enable two batteries to be charged at the same time and then isolates the batteries from each other when the vehicle is turned off, ensuring your starting battery is always charged and ready to go