Eveready S41E Silver Oxide Hearing Aid Battery
The Eveready S41E 1˝ volt silver oxide battery was manufactured by the
Union Carbide Corp of New York, NY for behind-the-ear and eyeglass hearing aids
from the late 1950s until silver prices spiked in 1979 and
1980, effectively causing the demise of silver oxide batteries in
hearing aids. This battery weighed around 1 g and
measured 0.455" in diameter by 0.165" high. |
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Top view of the Eveready S41E silver oxide battery. The top (negative
terminal) was coated with a thin shield of gold for better contact.
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Bottom view of the Eveready S41E silver oxide battery. The bottom and sides
comprised the positive terminal of the battery. Silver oxide batteries
produced 1.5 volts, rather than the 1.4 volts produced by mercury
batteries. Early transistors in the 1950s needed this extra voltage to
work properly.
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Side view of the Eveready S41E silver oxide battery.
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Front view of the older Eveready S41E silver oxide battery pak
showing the battery number and voltage (1.5 volts). The Eveready S41E
silver oxide batteries were sold in blister paks of 6
batteries each.
Unlike most blister paks, you extracted the
batteries
from the top of the pak. But first, you had to tear off the cardboard
tab. Then you rotated the face of the plastic case clockwise until a
battery was pushed to the top and would fall out into your hand. |
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Rear view of the older Eveready S41E silver oxide battery pak. Note
the top lines, "Golden Shield Provides Improved Contact".
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Front view of the newer (1976 vintage) Eveready S41E silver oxide battery pak. Unlike most blister paks, you extracted the Eveready
S41E silver oxide batteries
from the front by lifting the plastic tab (the black "dot" at the 12
o'clock).
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Rear view of the newer Eveready S41E silver oxide battery pak. The
special sale mentioned on the tab ended on September 30, 1976,
establishing the vintage of this 6-pak.
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