Heavy duty, intelligent 3-stage starter charger for 6V and 12V vehicle batteries. Leisure, deep-cycle, regular lead acid, AGM and gel cell batteries can be charged in or out of vehicles by trickle charge or a fast charge. Built-in heavy-duty clamps for quick and secure connection to battery terminals. Features start mode that provides a boost to weak batteries, which assists in starting vehicles. Intelligent microprocessor detects battery charge percentage and alternator effectiveness automatically by cycling through the large digital display. Includes built-in heavy duty clamps, robust all-metal construction housing, convenient carry handle and instructions.