Hugh Hetherington Hearing Aid Museum
Hugh Hetherington Hearing Aid Museum

The Hearing Aid Museum

Hearing Aids of all types—Ear Trumpets, Carbon Hearing Aids, Vacuum Tube Hearing Aids, Transistor Hearing Aids, Body Hearing Aids, Eyeglass Hearing Aids and much more!

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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

Unknown Carbon Hearing Aid Battery (1)

This unnamed carbon-zinc 3-volt hearing aid battery was used in carbon hearing aids somewhere around 1935. It is very similar to the Gem No. 1A except that the terminals were set ¾" apart, while the Gem 1A terminals were set 1" apart.

This battery weighed 9½ oz, and measured 3½" high by 2⅛" wide by 1" thick.

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Side/end view of the carbon hearing aid battery. The split down the side is from age.


 

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Top view of this carbon battery showing the battery terminals. Note that like the battery terminals of the Gem No. 1A, instead of being in the center, the terminals were set near the back edge of the battery.

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Bottom view of the unnamed carbon hearing aid battery.

 


 

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