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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. |
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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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Click picture for larger view |
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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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Click picture for larger view |
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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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Click picture for larger view |
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Bottom view of the unnamed carbon hearing aid battery.
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