Ulta-Lit Technologies 5001 Battery Tester, Use with C, D, AAA, AA, 9V, N and Button Cell Batteries Easy to use Battery Tester; Has a TriColor Meter: Green = Good, Yellow = Weak and Red = Replace For use with C, D, AAA, AA, 9V, N and Button Cell batteries, There is an adjustable arm on the unit to all for these different size batteries