The ZTS Mini Multi-Battery Tester™ (MINI-MBT) provides a comprehensive means of testing the state of charge or state of power for more than 15 battery types. The MINI-MBT’s microprocessor-based design makes battery testing simple - using a patented, high accuracy pulse load test. After a fully automatic test cycle, percentage of remaining battery capacity is indicated on the LED bar display. Battery types are clearly labeled next to appropriate contacts. There are no settings, and test results are easy to understand. Its small size makes it ideal for the gadget bag, toolbox, or home utility drawer. Negative test lead/probe conveniently stores in seam at side. Tests NiMH, Alkaline, and Lithium batteries. Uses 4AAA batteries (not included) Made in U.S.A. Patents 6,823,274 and D515,444.