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
14.6V 5A LiFePO4 charger 4Series 12V 5A Lifepo4 battery charger 14.4V battery smart charger For 4S 12V LiFePO4 Battery
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
Car Battery Charger 300A Battery High Power Fast Charger 12V/24V 220W EU/US Plug High Power Smart Pulse Repair Battery Charger
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
12v 50a Lifepo4 Charger 80A 460W Fast Charger 900w 50A Lithium Battery Charger 14.6V Battery Adapter Camping Battery Charging
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. When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery.
eBay
29.2V 10A LiFePO4 Battery Charger For 8S 25.6V 24V LiFePO4 Battery Pack Battery Smart Charger OLED Display Fast Charger
Aliexpress UK
Built-in LED indication ( lights up when VSR starts ). when charging and isolates the two batteries when not charging,which can widely used in 12v camper van trucks, caravans, and camping applications.
eBay
4 Slot Battery Charger LED Light Power Display Battery Charger for 1.2V NiMH AA/AAA Battery Charger Micro USB/Type-C Jack Input
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
For Dewalt 20V Lithium Battery Charger EU US UK Plug 240V Battery Charger For Dewalt DCB200 DCB609 DCB105 Battery Charger
Aliexpress UK
Built-in LED indication ( lights up when VSR starts ). when charging and isolates the two batteries when not charging,which can widely used in 12v camper van trucks, caravans, and camping applications.
eBay
12V 24V Battery charger diesel generator battery float charger 6A lead acid battery charger
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
POWERKAN TC1 Battery Charger for Li-Ion Batteries 21700 18650 26650Battery Charger, Type-C Single Slot Battery Charging Charger
Aliexpress UK