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 PD4 battery charger, suitable for 18650/26650/21700 /IMR/INR/ICR/3.2VLiFePO4, 1.2V Ni-MH/Ni-CD rechargeable batteries
Aliexpress UK
Maximum solar input current: 20A. Compatible with Multiple battery types : AGM, GEL, Flooded, and Lithium. 1 x 500mm RED 70amp READY MADE cable Relay to fuse holder lead. 2 x 250mm RED 70amp READY MADE cable from Battery to fuse holder lead.
eBay
BL1013 Lithium Battery Accessories Charger For Makita 10.8V 12V BL1014 Li-ion Battery Screwdriver Power Tools Drill Parts DC10WA
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 -4000mAh Rechargeable Lithium Ion Battery plus Charger for Electric Screwdrivers, Drills, Mini Angle Grinder 18650 Batteries
Aliexpress UK
For all your caravan and Camping needs. 6m cable between the 12V plugs. Short circuit protection. Sound & Vision. Easy-to-use, no need to go under the bonnet using booster cables. Jewellery & Watches.
eBay
12V/24V/36V/48V/60V/72V Battery Charger 2A 3A 5A For Lithium Battery Pack 12.6V 29.4V 42V 54.6V 67.2V 84V Smart Fast Charging EU
Aliexpress UK
eBay
Liitokala Lii-PD4 Lii-PD2 Lii-S12 18650 Battery Charger for 1.2V 3.7V NiMH 26650 21700 18350 18500 14500 AA AAA LiFePO4 Battery
Aliexpress UK
Bailey Approach 1, Bailey Approach II, Bailey Autograph, Bailey Advance, Coachman Pastiche (up to 2015), Coachman VIP(up to 2015), Coachman Laser (up to 2015), Elddis Encore (Range), Equi-Trek Evolution.
eBay
Mamidw Li-ion Battery Charger For DeWalt 10.8V 12V 14.4V 18V 20V Battery DCB118 DCB101 DCB127 DCB609 DCB200 DCB140 DCB105 DCB200
Aliexpress UK
Maximum solar input current: 20A. Compatible with Multiple battery types : AGM, GEL, Flooded, and Lithium. 1 x 500mm RED 70amp READY MADE cable Relay to fuse holder lead. 2 x 250mm RED 70amp READY MADE cable from Battery to fuse holder lead.
eBay
Original new portable 12V battery,100000mAh rechargeable lithium-ion 18650 battery pack, DC 12.6V charger, CCTV audio amplifier
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
LiitoKala Lii-500 without accessories, intelligent battery charger, LCD display 18650 26650 16340 18350 3.7V 1.2V test battery c
Aliexpress UK