Keep your vehicle's batteries fully charged so that they're ready to go when you are. The Duracell 4 Amp Charger/Maintainer is an intelligent, multi-stage charger that automatically adjusts to the power needs of your batteries. With 4 Amps of power it can quickly take batteries from dead to ready-to-start in under 2 hours. The multi-stage charging protocol ensures an optimal charge on all types of 6V or 12V vehicle batteries including, Lead Acid, Li-Ion, AGM and Gel. The maintenance stage is ideal for keeping stored batteries safely topped off without overcharging. The backlit LCD screen and straight forward user interface ensures that charging simple is intuitive. The Quick-Connect cable system makes it easy to connect, charge and go. The included clamps are ideal for quickly connecting to any battery while the ring terminals are intended for a semi-permanent installation, they are typically installed on a vehicle that requires frequent charging. Product Features:Charges all major battery types including Lead Acid, Li-Ion, AGM and GelIntelligent voltage detection automatically selects the correct charging voltage (12V or 6V) for your batteryMulti-stage charging ensures optimal battery performance without overchargingBattery reconditioning automatically repairs damaged batteriesIP65 weatherproof construction is ideal for outdoor useWall mountable with the integrated mounting holes (hardware included)Universal clamps fit any battery typeRing terminals are included for a semi-permanent installationWorks with cars, trucks, SUVs, boats, motorcycles, personal watercrafts and more