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
Lilon Battery Charger for 18V 21V Battery For Cordless Drill Battery Charger Lithium Ion Range of Power Tools For Makita
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
Battery Charger Suitable For Makita 18V 21V Li-ion Battery Portable Fast Charger for Makita Battery Replacement EU Plug US Plug
Aliexpress UK
Maximum charging current: 20A. Maximum solar input current: 20A. adaptive 3-phase Charging : Bulk, Boost, and Float. Compatible with Multiple battery types : AGM, GEL, Flooded, and Lithium. Automatic battery separator works without the need for diodes or VSR relays.
eBay
1pc 3.6V Button Battery Charger For Lithium Battery Ml2032 Lir2032 Lir2025 Lir2016 Mini Button Battery Charger
Aliexpress UK
Class A Battery Cell Long lifespan>10 years No memory effect LCD display(100-200Ah) Bluetooth(200Ah:APP name PowerQuarry) High speed charge and discharge High energy density Lead-free,acid-free BMS protection:overcharge,deep discharge,overload,overheat,short circuit protection IP65 Protection 5-Year Warranty Specification: Voltage:12,8V(8-200Ah) Recommended Charge Voltage:14.4V-14.6V(8-200Ah) Power:100Wh(8Ah),256Wh(20Ah),384Wh(30Ah),640Wh(50Ah),1280Wh(100Ah),1920Wh(150Ah),2560Wh(200Ah) Weight:0.85kg(8Ah),2.3kg(20Ah),3.65kg(30Ah),5.7kg(50Ah),11.55kg(100Ah),15kg(150Ah),19kg(200Ah) Size:150x92.8x64.15mm(8Ah),181x77x170mm(20Ah),223x95x175mm(30Ah),223x135x182mm(50Ah),328,5x172,5x214mm(100Ah),328,5x172,5x214mm(150Ah),345x190x245mm(200Ah) Charge Temperature:0℃-55℃ Discharge Temperature:-20℃-60℃.
eBay
2.0A Battery Charger Suitable For Makita 18V 21V Li-ion Battery Portable Fast Charger for Makita Battery Replacement EU/Us Plug
Aliexpress UK
Does not require manual disconnection after charging. UK Standard 3 Pin Plug Adaptor. Wrong polarity and short circuit protection. Bungs (Plugs) are only for transportation use. Battery Charging to 160Ah.
eBay
12.6V 2A 18650 Lithium Battery Charger For 12V 3S Li-ion Battery Polymer Smart Charger 18650 Battery Pack DC5525
Aliexpress UK
Battery charging range:4Ah to 200Ah. Output:2A & 10A Max. Batteries Type: All types of 12V Lead Acid Batteries [Standard (Flood Cell) ; AGM ; GEL ; EFB ; MF ; Start Stop ; Calcium (Ca Ca); Silver Calcium etc. ].
eBay
Button Battery Charger, Universal Charger For LIR Series Coin Cell Batteries 2032, 2430, 2025, 2450, 2016 And More
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
21v 18v 2a lithium battery charger 5 Series 100-240V 21V 2A battery charger for lithium battery with LED light shows charge
Aliexpress UK
After charging, it defaults to the state mode used before the last power failure. Requires power connection. LITHIUM BATTERIES ARE NOT ALLOWED. 'Motorcycle' mode.Suitable for various motorcycles, and various 12V lead-acid batteries.
eBay
42V 54.6V 67.2V 84V 5A Li-ion Battery Charger For 36V 60V 72V 48V Lithium Polymer Battery Pack Lithium Battery Charger
Aliexpress UK