ANCEL BST100 is a professional battery tester for lead-acid starting battery, along with checking the following battery conditions, boot, charging and charging. With great design, easy operation, accurate reading, complete functions, this tester supplies the readings for a great LCD and suggestions for sound and light when testing. Use the 4-wire kelvin method to complete the collection of a complicated data series to calculate each test data with built-in precise circuit and improved digital processor. Protection, loose lead detection, ensure safety and comfort during testing. So this is the best tool in battery sales fields, vehicle repair, and battery inspection in the equipment system associated with the lead-acid starter battery.