The Uanit Battery Tester Checker is a versatile and compact tool that allows you to quickly test the power level of a wide range of batteries, including AAA, AA, C, D, 9V, and button cell batteries. With its easy-to-read color-coded scales, you can easily determine the capacity of your batteries, making it a convenient companion for travel or everyday use. This universal battery tester features a movable arm to accommodate different battery sizes and two buttons on the side for testing 9V batteries, ensuring you can test all your batteries with a single device. This Uanit battery tester is a brand new and high-quality device that can quickly test the capacity of your batteries. It features double easy-to-read color-coded scales that indicate the power level of your batteries, making it easy to identify which ones need to be replaced. The compact and lightweight design makes it a perfect companion for travel, allowing you to test multiple sizes of batteries in one unit, including 9V, 1.5V (AAA, AA, C, D), and all kinds of button cell batteries. The tester has one movable arm to accommodate the battery, and two buttons on the side for testing 9-volt batteries.