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On-line 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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General EP-901 Hearing Aid "B" Battery
The General EP-901 22½ volt "B" battery was used in the 2-piece
vacuum tube hearing aids of the 1940s. It was often paired with an
EP-728 "A" battery which was of similar shape and size.
This battery was manufactured by the General Dry Battery Co. It weighed 4¼ oz., and measured 4 1/8" in height
and 1 1/8" in diameter.
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Click picture for larger view |
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The top view showing the battery socket. Notice that this "B"
battery has a 3-pin socket, whereas the EP-728 "A" battery only had two
pins.
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Click picture for larger view |
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