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

Eveready 425-P Hearing Aid "B" Battery

This Eveready 22˝ volt Mini-Max hearing aid "B" battery was used in 2-piece vacuum tube hearing aids in the 1940s.

It weighed 4.1 oz., and measured 3⅞" by 1 3/16" by 1.

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Rear view of the Eveready 425-P battery. Eveready was a brand of the Union Carbide Corp. of New York, NY.


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Side view of the Eveready 425-P battery.


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Top view of the Eveready 425-P battery showing the holes for the 3-pin battery cable plug.


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Bottom view of the Eveready 425-P battery.

 


 

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