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.
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PD100W Fast Charging Power Bank DIY Kit 20V 5A 6x 21700 Battery Pack Portable Customizable No Soldering Easy to Assemble
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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
Mecha style DIY 18650 Battery Storage Box 8 Cells 18650 Battery Power Bank Case Fast Charging Mobile Power Kits No Soldering
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
Toocki Mini Data Cord Wire Set Watch Wireless Charger USB C To Tpye C Fast Charging Cable Travel Multi Function Organiser Box
Aliexpress UK
Suitable for most 12V charging systems- Surge protection. 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
Toocki USB Type C To USB C Cable 60W 4 In 1 Mini Data Cable Set Storage Box Fast Charging Charger Mobile Phone Holder For Xiaomi
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
35W USB-C PD Fast Charger Cable Kit For iPhone 15 16 Pro Max 15 16 Plus 16e Samsung S25 Dual Type-C Quick Charging Braided Cable
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The relay is connected between the vehicles main battery (Positive) and the leisure battery (Positive). It simply connects between the two batteries. The most important part of the circuit are the fuses!
eBay
Toocki Mini Data Cord Wire Set Watch Wireless Charger USB C To Tpye C Fast Charging Cable Travel Multi Function Organiser Box
Aliexpress UK
6way Fuse Box with 12 fuse blades & Label Stickers. 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
Charging Port Metal Dust Stopper Cap Phone Speaker Dust Mesh Sticker for Samsung IPhone 16 15 14 Pro Max IOS Type C Cleaning Set
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
Mobile Phone Speaker Dust Plug Mesh Sticker for iPhone 16 Samsung Xiaomi Type C Charging Port Protector Cleaning Kit Universal
Aliexpress UK