Introducing the all-new GENIUS2, one of our most powerful, highest-performing, energy-efficient, and compact chargers yet. The GENIUS2 is a 6-volt and 12-volt battery charger, battery maintainer, and battery desulfator rated at 2-amps for lead-acid automotive, marine, and deep-cycle batteries, including flooded, gel, AGM, and maintenance-free, plus lithium-ion batteries.