This universal mini battery checker, maximize your battery usage by testing for dead batteries and reduce unnecessary waste. High Compatibility Testing Range: Can be used to test D, C, AA, AAA, N, 1.5 V button batteries and 9V batteries. LCD Screen: Easy-to-use analyzer shows about your batterys health, it will accurately shows whether the battery is in poor, weak, or good condition of voltage. Feature: Powered with only 1 x 1.55V button battery, working Temperature: 0C ~ 40C. Suitable for carbon, zinc, alkaline and rechargeable batteries. Color Code: Green means good, yellow means low and red means poor.It will accurately shows whether the battery is in poor, weak, or good condition of voltage. Product description Features: Easy to use and small in size makes it ideal for the gadget bag, toolbox, or home utility drawer. Clear LCD bar graph display for easy reading. Reliable and intelligently designed battery checker. Tri-color meter indicating the battery's strength. Precisely checks the power left in your batteries. Practical and instant readouts. Specifications: Testing Range: C, AA, AAA, D, N, 9V (6F22) and 1.55V button battery Working Temperature: 0C ~ 40C Power Supply: 1.55V button type battery (included) Package Includes: 1 x Battery Tester Size:92x63x14mm