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 E132E Hearing Aid Mercury Battery

This Eveready E132E hearing aid battery was made by Union Carbide Corp. of New York, NY for a few transistor hearing aids in the early to mid 1950s, probably starting in 1953.

This hefty mercury battery weighed a 0.8 oz. (24 g), and measured 1 5/16" by ⅝" (3.3 x 1.7 cm).

An unusual feature of this battery is that it produced 3.8 volts.

 

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Front view of the Eveready E132E battery. This battery was basically two RM-1  mercury cells of 1.4 volts each hooked in series to produce 3.8 volts.

If was used in a few early high-power transistor hearing aids including in one version of the Zenith Royal T. (Other versions used two RM-1 1.4 volt mercury batteries in series.

Note: the E132E battery was the same overall size as 2 RM-1 batteries laid end to end.

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Side view of the Eveready E132E battery showing the polarity arrow (at bottom) pointing to the bottom of the battery.

 


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Top view of the Eveready E132E battery with blue color-coding showing the negative terminal. This seems backwards, but was commonly used for mercury batteries where the bottom and sides comprised the positive terminal.


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Bottom view of the Eveready E132E battery showing the "+" for the positive terminal. Notice the "1" above the "+". This was the same marking as some RM-1-sized batteries.

 

 


 

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