10/25/50/250A 6/12V Manual Wheel Charger. 2-in-1 Device: Combines a powerful jump starter and battery charger High-Powered Performance - Powerful engine starter boasts 250 cranking amps (12 volts), which packs enough power to start cars, SUVs, trucks, boats, and other large engines Wide Compatibility - Compatible with 6 volt and 12 volt standard, AGM, gel, and deep-cycle batteries Fast 50 Amp 12 Volt and 25 Amp 6 Volt/12 Volt Boost Modes - With the two boost charging modes you can bring even deeply discharged batteries back to life Precision Control - The Schumacher Electric SC1445’s 135-minute timer gives the user complete control over the charging process