Eveready E122E Mercury Hearing Aid Battery
The Eveready E122E 2.8 volt mercury battery was manufactured by the
Union Carbide Corp for transistor body hearing aids in the mid 1950s. This battery weighed 0.8
oz. (22 g) and
measured 1 5/16" x 1" x ˝" (3.2 x 2.5 x 1.3 cm). |
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Top view of the Eveready E122E mercury battery showing the rectangular
positive terminal (right) and the round negative terminal (left).
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Side view of the Eveready E122E mercury battery showing various US
patent numbers—2422045, 2542575, 2636062, 2712565 & 23427.
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Front view of the Eveready E122E mercury battery showing the model
number and voltage (2.8).
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Bottom view of the Eveready E122E mercury battery showing the
positive terminal of one cell. Presumably this gave 1.4 volts from this
cell as well as the 2.8 via both cells.
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