Hitech - Versatile Battery Checker for More Than 12 Types of Batteries:AA,AAA,C,D,9v,CR123A,CR2,CR-V3,2CR5,CR-P2,Buttom. 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!