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 412E Hearing Aid "B" Battery

This is an Eveready 22½ volt Mini-Max hearing aid "B" battery used mainly in the larger 1-piece vacuum tube hearing aids in the 1940s and 1950s.

It weighed 1¼ oz., and measured 2" by 1" by ½".

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This Eveready model 412E battery came in a cardboard sleeve.

 

 


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When slid out of the sleeve, this Eveready model 412E battery has absolutely no markings on it. Perhaps the sleeve materials caused the ink to disappear.


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Another Eveready model 412E battery with the faintest markings showing it was indeed an Eveready 412E battery of the above design.

 


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The earlier (no name visible) battery (center) beside the sleeve (left) and a newer Eveready model 412E battery.

 


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Although the same model, this newer version of the 412E battery has a slightly different positive terminal (bottom).

 


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Ad in the Saturday Evening Post, January 22, 1949, showing the Eveready 412E 22½ volt "B" battery (right). Back then, this battery sold for $1.05. It is shown paired with the then new (and revolutionary) 1½ volt "A" battery— the Eveready 1005E  "air breathing" battery.

 


 

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