The Midtronics PBT-100 Battery Tester can accurately and quickly test batteries, even when discharged. The portable unit is activated by simply connecting clamps to the battery, setting the rating and pressing the test button. In seconds, the PBT-100 will display an accurate test decision. This tool provides a measurement range from 200-850 CCA with no user interpretation required. Users can access the voltmeter mode for testing both the starter and the charging system.