On-line Hearing Aid Museum

Hearing Aids of all types—Ear Trumpets, Carbon Hearing Aids, Vacuum Tube Hearing Aids, Transistor Hearing Aids, Body Hearing Aids, Eyeglass Hearing Aids and much more!

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General Info

Non-Electric

Carbon

Vacuum Tube

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Hearing Aid Batteries

General RG-3 Mercury Hearing Aid "A" Battery

The General RG-3 1.4 volt mercury "A" hearing aid battery was used in vacuum tube and transistor hearing aids in the late 1940s and 1950s. It was manufactured by the the General Dry Battery Company.

The General RG-3 mercury battery weighed about 1⅜ oz, and measured ⅝" high by 1" in diameter.

This battery was equivalent to the Mallory RM-3 battery.

Mercury batteries are no longer sold today because of the large quantities of mercury in them and the consequent environmental concerns.

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Top view of the General RG-3 mercury battery showing its name and model number.

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Bottom view of the General RG-3 mercury battery also showing its name and model number.

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The General RG-3 mercury battery was quite large. (Each mark on the ruler is 1/16".)

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