DY219 12V Car Battery Tester Digital Automotive AH CCA Voltage Battery Load Analyzer Multifunction Diagnostic Tool MiniThis battery tester is used for lead-acid starting battery, along with checking the following conditions of the battery, starting up, charging, and loading. With great design, easy operation, precise reading, complete functions, this tester supply the readings by a large LCD and hints by sound and light when testing. It utillizes 4-wire Kelvin method to complete collection of a series of complicated data for calculating every testing data with build-in precise circuit and improved digital processor. Moreover some circuit improvements including polar reversal protection, over voltage input protection, loose lead detection, ensure safety and convenience during testing. So this is the best tool in the fields of battery sales, vehicle repair and battery inspection in equipment system associated with lead-acid starting battery. Package include: 1* Storage battery tester 1* User manual (in English)