Add a useful option to your tool library with the Stanley FatMax battery charger. Its ideal for mechanics, hobbyists and those who frequently repair vehicles. This car battery charger automatically powers up and maintains levels. It keeps your cell at optimal capacity and is sealed and conformal-coated to protect against moisture, corrosion, dust and oil. Status indicators help you monitor progress as you work, and reverse polarity lights warn against an improper connection. Select the mode that suits your application. Attach this 8a battery charger and maintainer via three different connector options, which include clamps, ring terminals and a 12-volt dc plug.