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
AA / AAA Battery Charger Charging Box Portable 8W 4V Solar Battery Charger for AA and AAA Batteries Dropshipping without Battery
Aliexpress UK
Victron Energy - the globally renowned manufacturer of high quality hybrid power electronics. Photonic Universe is an official distributor of products from. Vehicle battery optimisation: specifically designed with efficient vehicle battery charging in mind.
eBay
100% New 18650 Battery 3.7V 3000mAh Rechargeable Li-Ion Battery with Charger for Led Flashlight Batery Litio Battery+ Charger
Aliexpress UK
Adaptive 3-phase Charging : Bulk, Boost, and Float. 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. 2 x MTA MIDI Fuse holders.
eBay
1.2V 2 Slots NI-MH Battery Charger Portable AA AAA Battery Charger 2A USB Batteries Charger With Indicator Light
Aliexpress UK
remote not included and red cable cover bit not included.
eBay
EU Plug Full Automatic Car Battery Charger 12V 24V High Power Fast Charger Repair Battery Charger For Lead Acid Battery
Aliexpress UK
Current is NOT taken from the input battery and given to the output battery. Manual mode and regenerative braking mde allows you to override this. Victron Energy. Fuses & Fuse Holders. Battery Monitors.
eBay
Repair Battery Charger 12V 24V For Lead Acid Battery EU Plug High Power Full Automatic Car Battery Charger Fast Charger
Aliexpress UK
This adaptor allows for compatibility with UK electrical outlets, making it ideal for use in any room or bathroom. Designed for convenience, this unit is a must-have for travelers from the EU looking to power their personal grooming devices while in the UK.
eBay
4 Slots Battery Charger With LCD Intelligent Display Charger For 1.2V Ni-MH/Ni-Cd Rechargeable Batteries AAA/AA Battery Charger
Aliexpress UK
Adaptive 3-phase Charging : Bulk, Boost, and Float. 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. 2 x MTA MIDI Fuse holders.
eBay
Battery Charger Enduro Batteries Charger with Type-C Cable for GoPro HERO13 and GoPro 13 Black Enduro Battery Charger
Aliexpress UK
The Current is NOT taken from the input battery and given to the output battery. Manual mode and regenerative braking mode allows you to override this. Regenerative braking (requiring ignition feed).
eBay
4 Slots USB Charger Li-ion Charging 4.2V Li-ion Battery 2X 3X 4X Portable Rechargeable Battery Charger For 18650 Battery Charger
Aliexpress UK