1、Function: The battery tester is specially designed to test the remaining charge of the button battery. Designed for most common cell button batteries. 2、Capacity: Built in battery compartment small drawer holds at least two button batteries. Great and convenient for instant testing of your battery capacity. 4、ABS Material: Made of high quality ABS material, stable and durable, can be used for a long time. There are scales of the tool that makes you easy to read the results. 5、Portable: Lightweight and easy to carry, you can easily carry it in your pocket and use it anytime. Mini size of the battery tester is super practical. 3、Display: Equipped with LCD screen, so that you can check the battery status anytime and anywhere. Simply place the battery in the correct area, the meter will show you the batteries power.