• Universal tester compatible with 9V and 1.5V batteries, including AA, AAA, C, D and button cells. • Color-coded digital LCD display showing charge status in 18 levels for quick and accurate results. • No internal power required; the device is activated using the power from the battery being tested. • Adjustable sliding arm design to fit different battery sizes and allow for one-handed use. • Made with durable ABS casing, top loading and non-slip grips for added safety and strength. • Allows for quick identification of whether a fault lies in the device or the battery, helping to reduce waste and save money.