The DieHard 250A wheeled battery charger and engine starter lets you start your engines without worry. This charger works for 6 volt and 12 volt batteries used on standard, AGM and gel cell batteries. The DieHard 250A charger and engine starter features a 50 amp boost rate. A 12 feet total reach, 6-gauge output cable and heavy-duty, color-coded clamps ensure a simple hook-up.