The Genius5 is a portable and automatic battery charger. It can be used for both 6V and 12V lead-acid and 12V lithium-ion batteries. The Genius5 is designed for charging cars, boats, RVs, SUVs, diesel trucks, motorcycles, ATVs, snowmobiles, personal watercraft, lawn mowers, and much more. It can be used as a battery maintainer to keep both starter and deep-cycle batteries fully charged. It also monitors battery activity for safe and efficient charging without any overcharge.An improved start-voltage sensor now detects dead batteries as low as 1-volt. And an all-new force mode allows manual charging for extreme dead batteries - all the way down to zero volts. FeaturesA 6V and 12V battery charger and maintainerCharges lead-acid and lithium-ion batteries up to 120 amp-hoursBuilt-in battery desulfator to recover worn-out batteries.Smart indicators quickly detect when the battery charger is connected in reverse polarity, connected to an incompatible battery, or if the battery is failing.SpecificationsAmperage: 5AWeight: 2 lbs