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
Dewalt DW089LG Self Levelling Multi Line 3 x 360 Degrees Green Beam Laser 12V MAX* with Battery 2.0Ah Li-Ion and Charger
Aliexpress UK
The WYE 200W Car Inverter is a reliable power adapter designed to convert DC 12V to AC power, making it ideal for use in vehicles. With fast charging capabilities via 2 USB A&C ports, this inverter from WYE is perfect for powering various electronic devices while on the road. The manufacturer part number Y-INV200W ensures easy identification and compatibility with your vehicle's power system. Trust the WYE brand for quality and efficiency in car power inverters.
eBay
PD3.0 30W PD Fast Charging Module Type-C Interface input 8-32V 24V TO 5V 9V 12V Quick Charger F/ Battery Mobile PHONE Power Bank
Aliexpress UK
EASY TO USE: User-friendly design allows for hassle-free charging of your car or van battery.
eBay
CN3791 MPPT Low Power Solar Charger 6V 9V 12V Solar Panel 3.7V 4.2V Lithium Battery Charging Board Modules
Aliexpress UK
Clear Power Specifications: Input: AC 100V-240V, 50/60Hz, 80mA, Output: DC 12V, 600mA, 6W. Plug: UK Plug. TypeElectric Power Adapter Converter. Fit240V Power Plug To 12V. Power: 6W (If more than 6W, will be burned).
eBay
3A Type-C Li-ion Charger Module TI BQ25606 Buck 4.5-12V to 4.2V with Overcharge Protection
Aliexpress UK
This is a high quality mains power adapter fitted with a cigarette socket like the type in your car. Plug: Car cigarette lighter socket. 1x AC to DC Car Cigarette Lighter Converter Adapter. Converts 100-240V AC household current to 12V DC power.
eBay
4S 12v High Power 14.6V/12.8V 10A Lifepo4 Charger 110-220V for Lithium iron phosphate Battery Pack
Aliexpress UK
AC to DC Car Socket Adapter – 240V UK Plug to 12V Converter. Simply plug it into a UK mains socket and power devices designed for a 12V car cigarette lighter. • Converts 240V AC to 12V DC car socket output.
eBay
Type-C 15W 3A Fast Charge UPS Power Supply / 18650 Lithium Battery Charger Module DC-DC Step Up Booster Converter 5V 9V 12V
Aliexpress UK
240V Mains Plug to 12V 10A Socket Adapter Car Cigarette Lighter Power Converter. Suitable for devices up to 60W Only. 12V Car to Mains Converter, Standard UK 3-pins Plug. 12V Interior LED. Oxygen Sensor Socket.
eBay
SDLA12TA MPPT Solar Controller Charging Module for 12V 1-1000AH Lead-Acid Battery Solar Panel Regulator Charger Board
Aliexpress UK
By connecting the converter to the battery, it can convert from 12V DC to 220V/230V AC at 50Hz/60HZ. Adjustable AC Charging Current: Maximum of 40A, with a minimum setting of 2A for tailored charging.
eBay
1PCS USB Type-C PD Trigger Board Module PD/QC Decoy Board Fast Charge 12V USB-C Power Delivery High Speed Boost Charger Module
Aliexpress UK