Meet the GENIUS2 - Similar to our G1100, just better. It's 31 Percent smaller and delivers over 82 Percent more power. And it's simpler and easier to use than ever before. Plug-in, connect to the battery, select a charge mode, and start charging your battery. A fully-automatic, worry-free battery charger for year-round use. A fully-automatic, worry-free battery charger for year-round use. Designed for 6 Volt and 12 Volt lead acid automotive, marine, and deep-cycle batteries.