Small and Portable: This small, compact and lightweight battery tester is easy to carry. The size is only 92.3 x 61.9mm, the weight is 31.7g. High-quality materials: Made of high-quality materials. Made of high-quality insulating ABS plastic, lightweight and compact, easy to carry. Usage &Battery Saving: Simply insert a battery into the corresponding battery detector, which will quickly show you the status of your batteries thanks to the usage bars, thus avoiding damage caused by unnecessary refilling Easy to use. Read: Green means good, yellow means low and red means bad. It accurately indicates whether the battery is low or in a good voltage state. Wide range of applications: The wide range of tests includes C, AA, AAA, N, D, 9V (6F22) and 1.5V button cell