Schumacher PST-500 DSR ProSeries 500 Amp Carbon Pile Battery Load Tester 500 ampere Carbon Pile Charging System Analyzer for 12 Volt Battery Systems Variable load carbon pile tester offers maximum accuracy when performing battery load tests Separate voltmeter and ammeter allow easy viewing and understanding of battery test results Color coded, temperature compensation pass/fail bands on volt meter Tests batteries up to 1000 CCA