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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6A 12V Repair LCD Display Intelligent Car Battery Charger Car and Motorcycle Battery Charging Unit Lead-Acid Battery
Aliexpress UK
ABS LP130 Leisure Battery 130AH. ABS 12 Volt Low Profile LP130 Amp Leisure Battery - 'Low Height-Profile 130ah sealed'. Capacity (C100) 130Ah. These compact batteries are designed for deep cycle battery applications where ordinary leisure batteries do not quite fit.
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Digital Battery Testers Detector Multifunctional Quickly Measure Battery AA/AAA/C/D/9V/1.5V Button Cell Measurement ANENG BT169
Aliexpress UK
ABS LP110 Leisure Battery 110AH. ABS 12 Volt Low Profile LP110 Amp Leisure Battery - 'Low Height-Profile 110ah sealed'. These compact batteries are designed for deep cycle battery applications where ordinary leisure batteries do not quite fit.
eBay
Digital Battery Testers Detector Lithium Battery Capacity Tester AAA AA Button Cell Test ANENG BT138 Display Analyzer Test Tool
Aliexpress UK
Advanced 027 Car Battery. Product colour may vary. Our batteries range from 1, 2, 3, 4 and 5 year. Our Tech team will diagnose the fault over the phone and will assist you.
eBay
NEW Battery Converter Adapter for Bosch 18V Battery Convert To for Lidl Parkside X20V Li-Ion Battery for Parkside Tools Use
Aliexpress UK
SuperBatt Automotive battery range is designed with Advance Calcium Technology which makes them Maintenance Free and give Longer Life compare to conventional automotive batteries. SuperBatt SILVER 9000 [Super Excellence].
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FOMITO V-Lock Mount Battery Plate Adjustable Jaws Versatile V-Mount Battery Plate for Battery Power Supply
Aliexpress UK
Product Code LS019. UK Code TYPE 019. This is a high performance Wet Cell Flooded Lead Acid Battery with Calcium Silver/Tin alloy Technology. For cars and vehicles with START/STOP Technology (Must replace AGM Battery with AGM Battery and EFB Battery with EFB Battery).
eBay
Battery Adapter Converter Fit for Dewalt 14.4V 18V 20V Li-Ion Battery DIY Power Tool Battery Converter with Fuse Connector
Aliexpress UK
Battery: MIDAC IT4B EFB. MIDAC Batteries. MIDAC EFB (Enhanced Flood cell Battery) battery uses high-performance components and materials, advanced lead calcium alloys. It is ideally suited to cars with start-stop technology or regenerative braking systems.
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6A 12V Battery Repair LCD Display Intelligent Car Battery Charger Car and Motorcycle Battery Charging Unit Lead-Acid
Aliexpress UK
The Renogy 12Volt 50A Battery Charger is a versatile and efficient solar charge controller suitable for off-grid systems. With a current output of 50A and MPPT charging mode, this dual DC-DC charger is compatible with 12/24V batteries. Featuring Bluetooth module connectivity, LED indicators, and automatic voltage detection, it is designed for easy monitoring and maintenance. Ideal for camping, hiking, home, garden, and backup power applications, this Renogy charger is a reliable choice for those looking to harness the power of solar energy efficiently. Used for one season and in perfect working order.
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BT173 9V/12V/23V Battery Tester AA AAA Household LCD Digital Display Button Cell Battery Tester Power Bank Detector Tool
Aliexpress UK