This is what you need if you don't have a power source and want to use a 12v Leisure Battery to operate as a battery tender.
OptiMate 4 Battery Charger Optimiser Quad Program TM632 12V Lead Acid & Lithium
Optimate Lithium Battery Charger LiFePO4 Motorcycle Kart Bike Rotax Batteries
Optimate O114 Battery Charger Motorcycle Smartphone Camera GPS USB Din Plug
CONNECTION LEAD FOR USE WITH OPTIMATE 4 BATTERY CHARGER (NEW SAE CONNECTOR)
