Neewer BT-168D Digital Battery Tester Volt Checker for AA AAA C D 9V 1.5V Button Cell Batteries Neewer BT-168D Digital Battery Tester, practical tool for home-use Test standard and rechargeable batteries: 9V, AA, AAA, C, D, 1.5V Button Type Easy-to-read , digit indicates power level Convenient and easy to use Note: This battery tester is used for test the battery voltage, NOT the precise battery capacity