Duracell’seasy-to-use and ultra-safe 4A Battery Charger and Maintainer is designed to keep vehicle’s battery charged so it's always ready to go. Whether the vehicle is on the road or in the water, 12V or 6V, lead acid or Li-ion, the Duracell 4A Charger can be used for safe, reliable battery maintenance without overcharging. It ensures an optimal charge on all types of 6V, 12V, and Li-ion vehicle batteries. It also features a maintenance mode to keep stored batteries topped off between uses and is rated IP65 for weatherproof construction.