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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General Info

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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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Although the same model, this newer version of the 412E battery has a 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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