Hitech - Versatile Battery Checker Tester for AA, AAA C, D, 9V, CR123A, CR2, CR-V3, Button Cells Tests more than 12 types of batteries including: AAA, AA, C, D, 9V, CR123A, CR2, CR-V3, button cells LCD tells you how much charge (energy) remains in batteries Replace only the batteries you need to; no more wasting good ones!