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Click on the "General Information" button (top button above) for an overview and general information on this category of hearing aid.

Hearing Aid Batteries

This Novel H-R5 1.3 volt mercury battery was used in assistive devices such as telephone amplifiers in the 1960s and 1970s.

It is equivalent to our "N" size battery today. It weighs about ¼ oz., and is
1 3/16" by 9/16" in diameter.

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