The Bosch BAT 155 Heavy Duty Batter Tester is an advanced heavy duty battery and electrical system tester, designed for the commercial vehicle industry, that features patented single load, dynamic resistance technology that provides fast and accurate results. Accurately tests 6V and 12V batteries, with 100 to 6,000 Cold Cranking Amp (CCA) test capacity, including AGM, Gel Cell, flooded lead-acid, Start/Stop EFB and Commercial SLI batteries using a micro-load test for proven results. Versatile tool also tests 12V and 24V charging systems with a diode/ripple test. BAT 155 features: 1.5VDC to 60VDC testing range, detachable test clamps for service or replacement, infrared temp sensor that measures battery temperature for increased accuracy of CCA measurement, and extra battery charging posts to simplify hookup. Optional amp probe and voltmeter sold separately. Supports English, French (Canadian), and North American Spanish languages. Integrated printer captures test results for customer records, presenting state of health and state of charge percentage.