OEM Technology at a Toolbox Price Accurate battery test decision in seconds. No user interpretation of meter required. Tests discharged batteries - no need to charge before testing. Voltmeter mode for testing both the starter and the charging system. Proven conductance technology and test algorithms required for warranty testing at automotive dealers around the world. Shows available power in CCAs at the end of each test. High and low voltage capture for improved starter/charging system testing. Bad cell detection. 200 to 850 CCA battery testing range. 8 to 17V battery voltage range.