Introducing the revolutionary NOCO GENIUS1 6V/12V 1A Smart Battery Charger, Maintainer, and Desulfator. The GENIUS1 stands out as 1 of NOCO's most powerful, highest-performing, energy-efficient, and compact chargers yet. The GENIUS1 serves up a 6V or 12V battery charger, battery maintainer, and battery desulfator rated at 1A for lead-acid automotive, marine, and deep-cycle batteries, including flooded, gel, AGM, and maintenance-free batteries plus lithium-ion for unparalleled versatility. Precision charging integrates a thermal sensor that detects the ambient temperature and alters the charge to eliminate over-charging in hot climates or under-charging in cold climates. The GENIUS1 can charge dead batteries as low as 1V. Or, you can use the game-changing Force Mode that lets you take control and manually begin charging dead batteries at down to 0V. Fully automatic, worry-free operation means you can leave it for year-round use. Beyond charging and maintaining your battery, this NOCO GENIUS detects sulfation and acid stratification and restores lost performance for stronger engine starts and extended battery life. Smaller yet more powerful than ever Charges 6V or 12V lead-acid automotive, marine, and deep-cycle batteries including flooded, gel, AGM, maintenance-free, and lithium-ion Thermal sensor detects ambient temperature and alters charge to avoid over- or under-charging Charges dead batteries as low as 1V Force Mode manually charging on dead batteries down to 0V Detects sulfation and acid stratification and restores lost performance Compatible with all types of vehicles: cars, motorcycles, lawnmowers, ATVs, tractors, trucks, SUVs, boats, classic cars, hot rods, and more