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A portable, convenient way to carry your hearing aid battery tester, right on your keychain!

This compact, ultra convenient hearing aid battery tester & storage unit lets you test any size hearing aid battery, and carry up to 6 extra batteries anywhere you want to go.

Pocket-size digital battery tester with key ring and battery holder compartment.

Plastic battery holder from Warner Tech-Care includes keychain to keep spare batteries close at hand. Two separate compartments.

An easy opening keychain battery holder with two compartments.