The ZTS MINI-9RL Multi-Battery Tester? (MINI-9RL) Bundlw with Case and Micro Fiber Cloth provides a comprehensive means of testing the state of charge or state of power for more than 12 battery types, including 9V Li-Ion and NiMH rechargeable. The MINI-MBT9R?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 Alkaline and NiMH batteries. Uses 4AAA batteries (not included) Made in U.S.A. Patents 6,823,274 and D515,444. Display: 5 LEDs - colors green, yellow, red Pulse Load: magnitude varies according to battery type Operation: microprocessor-controlled test cycle Test duration: approx. 2 seconds Contact terminals: solid brass, nickel-plated Tester Dimensions: 4 x 2.5 x 0.75 inches Tester Weight: approx. 3 oz. (85g)