Automatically combines two batteries when charging and isolates the two batteries when not charging, which can widely used in 12v camper van trucks, caravans, and camping applications. When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery.
eBay
18650 Battery Rechargeable Battery 3.7V 18650 2000mAh Capacity Li-ion Rechargeable Battery for Flashlight Torch Battery+Charger
Aliexpress UK
This high-quality leisure battery is perfect for use in boats, yachts, and caravans. The battery is made from Lithium Iron Phosphate (LiFePO4) which provides superior performance and longevity compared to traditional lead-acid batteries.
eBay
SU 12V Battery 120Ah 18650 lithium battery pack Rechargeable battery for solar energy electric vehicle battery+12.6v3A charger
Aliexpress UK
This ULTRAMAX 12V 100Ah LiFePO4 Lithium battery is perfect for powering a range of devices, from high drain to low drain and even solar/wind devices. Its compact and lightweight design also makes it easy to transport, so you can take it with you on the go.
eBay
EEMB LIR2050 Rechargeable Battery With Charger(optional) 3.7V 2050 Lithium Ion Battery 110mAh Lithium Cell Coin Batteries
Aliexpress UK
Automatically combines two batteries when charging and isolates the two batteries when not charging,which can widely used in 12v camper van trucks, caravans, and camping applications. When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery.
eBay
DEWALT battery 20v，original battery charger, fast charging, lithium battery, tool battery, 60V, 2.0-9.0AH, DCB115, DCB118
Aliexpress UK
Can be fitted alongside Sargent power supply units .
eBay
24V Battery 120Ah 18650 lithium battery pack Rechargeable battery for solar energy electric vehicle battery+25.2v2A charger
Aliexpress UK
Sleek Design: The black faceplate seamlessly integrates into modern interiors, and its universal design makes it easy to install in cigarette lighter sockets for instant access. Over 15 Years Experience.
eBay
18650 Battery Rechargeable Battery 3.7V 18650 12000mAh Capacity Li-ion Rechargeable Battery for Flashlight Torch Battery+Charger
Aliexpress UK
Output: 12V. 1 x UK plug. 1 x Battery Clamp Connectors.
eBay
PALO 1.2V AA AAA NIMH Rechargeable Battery Batteries 2A 3A With 12 Slots LCD USB Fast Battery Charger for 1.2V AA AAA Battery
Aliexpress UK
It is a 100Ah 12V Lithium Iron Phosphate battery from ULTRAMAX, and its size is DIN M8. The chemical composition of this battery is Lithium Iron Phosphate (LiFePO4). The ULTRAMAX battery is perfect for those who need a dependable power source that is also eco-friendly.
eBay
Original S2S Drones Battery 3.7V 2000mAh RC Qudcopter Battery Spare Part Battery For S2S Mini Drone Battery With Charger
Aliexpress UK