Cartman Automatic Battery Car Charger 3.8A Maintainer for 100Ah Lead-acid Battery, All types of ATV, Lawn Mower, Motorcycle, Automotive, Marine, RV, Power Sport, Lawn & Garden, AGM, Gel Cell Batteries Battery Maintainer for use on 6V & 12V battery systems Easy connection to vehicle battery using the included battery clips & O-ring terminals. High-frequency smart charging technology keeps batteries at optimal charge Automatically switches between charging mode and float mode monitoring LCD screen