Energizer 84028 12V Battery Charger and Maintainer (4A): * 12V charger maintainer * Charges and maintains sealed lead acid batteries in boats, motorcycles, ATVs, snowmobiles and other vehicles * Conveniently and safely maintains battery charge while in storage without having to disconnect from vehicle * Switch mode power for better efficiency and reliability * Small and lightweight * Full 3 stage charger * Short circuit protected * Reverse polarity protected * Back feed protected * 3 color charge stage indicator * Multiple output cords * Ring terminal for permanent mount or battery clamp for random charging * Plastic case for electric shock protection * 1A