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 145 Hearing Aid Battery

The Eveready No. 145  was a most unusual battery. This 4˝ volt hearing aid battery was, as near as we can tell, made specifically for just one hearing aid—the Western Electric Model 1A carbon hearing aid that came out in 1938. Because it was only used in one hearing aid, it is quite rare.

It weighed 9.2 oz. (260 g), and measured 4⅜" x 3⅜" x 1⅛" (11.2 x 8.6 x 2.8 cm).

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Front view of the Eveready No 145 carbon hearing aid battery showing the model No. (145), voltage (4˝) and make (Eveready) and that it was specifically a hearing aid battery.

 


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Top front view of the Eveready No. 145 carbon hearing aid battery.

Notice the 4 holes in the top of the battery into which the 4 prongs of the carbon amplifier or battery plug fit.

This arrangement is probably unique to this battery.


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Top view of the Eveready No. 145 carbon hearing aid battery showing the four holes (jacks).

Normally, carbon hearing aids used two jacks—one positive and one negative. This battery has 4. The two jacks at the right and the two jacks on the left each consist of a positive and negative jack.

It consists of 3 cells of 1˝ volts each wired in series to give 4˝ volts. Presumably, it is wired internally such that each set of jacks is 4˝ volts.

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Rear view of the Eveready No. 145 carbon hearing aid battery.

 


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View of the rear bottom right corner of the Eveready No. 145 carbon hearing aid battery showing the code "E 9" stamped there.

 


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Bottom view of the Eveready No. 145 carbon hearing aid battery.

 

 


 

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