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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