377 Silver Oxide Hearing Aid Battery
The No. 377 1˝ volt silver oxide hearing aid battery was made by an
unknown manufacturer probably in the 1970s.
The No. 377 silver oxide battery weighed less than a gram, and measured
0.10"
thick
by 0.26" in diameter (0.25 x 0.67 cm).
Note: high silver prices in the 1980s sounded the death-knell of
silver oxide batteries. In addition, the then new silicon transistors
could now run on the lower voltage (1.45 volts) of the zinc-air
batteries. |
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Bottom view of the No. 377 silver oxide battery showing the positive
terminal indicated by the + in the center.
The model number (377) is at the topp and the bottom reads,
"Silver oxide cell".
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