Lamina UM-5 Hearing Aid Battery
The Lamina UM-5 (type "N") 1˝ volt battery was made
by the Toyo Dry Battery Co. Ltd. of Japan around 1960.
The Lamina UM-5 was a carbon-zinc battery and weighed 0.1 oz.
(4 g). It measured 1 3/16" high
by 7/16" in diameter (3.0 x 1.1 cm). |
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Front view of the Lamina UM-5 battery. "N"-sized batteries were
commonly used in transistor body aids in the 1950s and 1960s. They are
still used for some assistive listening devices today.
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Top view of the Lamina UM-5 hearing aid battery showing the
positive terminal.
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Bottom view of the Lamina UM-5 hearing aid battery showing the
negative terminal.
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