Keychain hearing aid battery tester Fit for key-ring with battery compartment for 2 cells Convenient and Easy to Use 2 colors Keychain hearing aid battery tester is ideal gift suitable for hearing aid promotion. Convenient and Easy to UseMeasures 1.5" by 1" on 2"...

Activair battery tester or battery checker to check the battery of hearing aids Suitable for various of hearing aid battery The Activair Hearing Aid Battery Tester or battery checker has a battery read-out display and battery storage compartment. A large, easy-to-read indicator shows...

Hearing aid battery tester with stroage compartment LCD display Small size, portable Test all sizes of hearing aid batteries This hearing aid battery tester can be placed on your keychain, so that you are able to test your batteries at any time. The tester has a light that will glow...