Schumacher SE-8050 4/30/60/200/300 Amp Manual Charger With Tester Accommodates both 6 and 12-volt batteries Ideal for fleet operations and industrial use Has the ability to test batteries and alternators Battery load tester tests 50 and 100-amps on 6 and 12-volt systems respectively 30 amp rapid charge charges a 6V or 12V battery in 1-2 hrs