12-Volt 2, 4, or 8 Amp Charger-Maintainer-Desulphator-Conditioner Model 12248 is a 3-stage Constant Current - Constant voltage - Float mode charger -maintainer-desulphator (conditioner) that extends both the performance and life of all type / size/ brands of 12-Volt batteries. These include all maintenance-free, marine-RV deep cycle, Gel, AGM dry types, as well as spiral wound constructed sealed types such as Optima, Odyssey, Exide, Interstate brands. Push-button selector for AGM, Gel and Flooded (filler caps) types ensures 100% compliance with all leading battery manufacturer's specifications. FREE battery condition indicator ($11.95 retail value) , with instant pushbutton LED read-out, when you register your warranty on the manufacturer's web site. Simple connection to any type 12 volt battery. Battery Condition Indicator Model 12103 Also free with every purchase: The VDC ABS-248 Temperature Sensor (a $19.95 value). Included with every package! The BatteryMINDer automatically dissolves power-robbing sulphation crystals using safe, low voltage, high frequency U.S. Patented pulse technology This unit comes with clips, round eyelets only. No cigarette adapter plug. Features: Input: 115VAC Safely charges 70% - 200% faster than any/all known conventional constant voltage chargers.