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 E122E Mercury Hearing Aid Battery

The Eveready E122E 2.8 volt mercury battery was manufactured by the Union Carbide Corp for transistor body hearing aids in the mid 1950s.

This battery weighed  0.8 oz. (22 g) and measured 1 5/16" x 1" x ˝" (3.2 x 2.5 x 1.3 cm).

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Top view of the Eveready E122E mercury battery showing the rectangular positive terminal (right) and the round negative terminal (left).


 

 

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Side view of the Eveready E122E mercury battery showing various US patent numbers—2422045, 2542575, 2636062, 2712565 & 23427.

 


 

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Front view of the Eveready E122E mercury battery showing the model number and voltage (2.8).

 


 

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Bottom view of the Eveready E122E mercury battery showing the positive terminal of one cell. Presumably this gave 1.4 volts from this cell as well as the 2.8 via both cells.


 

 


 

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