Dual Battery Isolators also feature surge protection and a L.E.D indicator designed to alert the user when the unit is engaged. - Suitable for most 12V charging systems- Surge protection. When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery.
eBay
Remote Battery Disconnect Switch 12V 200A Kill Switch for Car Anti Theft Battery Kill with Wireless Remote Control Relay Fobs
Aliexpress UK
Dual Battery Isolators also feature surge protection and a L.E.D indicator designed to alert the user when the unit is engaged. - Suitable for most 12V charging systems- Surge protection. When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery.
eBay
Remote Battery Disconnect Switch 12V 200A Battery Cut Off Switch Relay Anti-Theft Remote Control Kill Switch for Car Boat RV Van
Aliexpress UK
When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery. So it does not drain your main starter battery and you will always be able to start your vehicle.
eBay
Automotive Relay Remote Car Control Battery Disconnect Anti-Theft with Dual Remote Control Switch Battery Switch Relay 12V
Aliexpress UK
When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery. So it does not drain your main starter battery and you will always be able to start your vehicle.
eBay
Battery Switch Relay 12V Remote Car Control Battery Disconnect Cut Off Isolator Anti-Theft with Dual Remote Control Switch Relay
Aliexpress UK
The car wireless battery isolator is universally suitable for car, truck, SUV, trailer, and so on. This car battery disconnect switch can master kill your vehicle system power, extend and protect the battery and engine life.
eBay
Battery Switch Relay 12V Remote Car Control Battery Disconnect Cut Off Isolator Anti-Theft with Dual Remote Control Switch Relay
Aliexpress UK
Battery disconnect switch rated current: 240A. Disconnect Switches can solve the power consumption caused by such problems, and can extend the battery power and service life of cars. It can effectively protect and prolong the life of car battery.
eBay
Battery Switch Relay 12V Dual Remote Control Battery Cut Off Switch Relay Anti-Theft Control Kill Switch for Car Boat RV Van
Aliexpress UK
When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery. So it does not drain your main starter battery and you will always be able to start your vehicle.
eBay
RT-901 2 In 1 Car Relay Battery Voltage Tester Tester Relay Tester Vehicle Relay Tester Durable
Aliexpress UK
When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery. So it does not drain your main starter battery and you will always be able to start your vehicle.
eBay
DC 12V 24V 100A 200A WM686 Universal Relay 4 Pin Normal Open Car Starter Relay for Battery ON/Off Split Charge Relay Switch
Aliexpress UK