• Small and portable: This battery tester is compact and lightweight, easy to carry. Size: 92.3 x 61.9 mm, weight: 31.7 g. • Quality materials: Made with high-quality insulating ABS plastic, lightweight and compact, easy to use. • Battery saving: Place a battery in the appropriate detector and it will quickly indicate the status of your batteries using usage bars, preventing damage from unnecessary recharges. • Easy to read: Green means good, yellow means weak, and red means bad. It accurately indicates whether the battery is low or in good voltage condition. • Wide range of uses: Compatible with C, AA, AAA, N, D, 9V (6F22) batteries and 1.5V button cells.