BT189 Universal Battery Tester for C,AA,AAA,D,N,9V 6F22 Batteries 1.5V 3V Button Cell Batter Power Bank Detectors Capacitance Description: Model: BT189 Measuring range: 0-10V Size: 92x63x14mm (mm) Battery type: No. 7 Specification: black, orange, gray Specifications: 1. Without power supply, the battery voltage can be measured quickly, and the test results can be displayed digitally, which is compact and convenient to carry. 2. It is applicable to detect all 9V, No. 1, No. 2, No. 5, No. 7 button batteries, and the test voltage is directly displayed digitally. 3. This battery checker can display the battery capacity for you, which is convenient for you to replace the battery. 4. This digital battery tester is easy to read data and can display the power quickly and easily, saving you time and energy. 5. This excellent tool can remind you to replace the battery and check the battery capacity to avoid waste. 6. Usage: The 9V battery is directly connected to the two test holes on the side of the tester. Pay attention to the positive and negative poles. For other batteries, please open the test arm on the top of the tester with the hand board, and just clip the battery in. Pay attention to the positive and negative poles. Package Included: 1 * Battery tester