Hugh Hetherington Hearing Aid Museum
Hugh Hetherington Hearing Aid Museum

The 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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Click on the "General Information" button (top button above) for an overview and general information on this category of hearing aid.

 

Hearing Aid Batteries

Great London No. 2 Carbon Hearing Aid Battery

The Great London No. 2 carbon hearing aid battery was manufactured for The Great London Hearing Aid Company of Toronto, Ontario for their hearing aids made during the 1930s.

This 3-volt battery was comprised of two large carbon-zinc dry cells in a black paper wrapping.

It measured 3½” high by 2⅛” wide by 1” thick and weighed 6 oz.
 

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Top view of the Great London No. 2 carbon hearing aid battery showing "London 2" stamped into the top.

The pin spacing is ¾". Note that the pins were set to the back of the battery, not in the center like many similar batteries were. This is because this battery was used with a "fat" microphone and setting the pins back helped counterbalance the battery so it didn't fall over when the microphone was directly attached to the battery.

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Side view of the Great London No. 2 carbon hearing aid battery showing the plain black paper that covered the battery.


 

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Outside view of the box in which the Great London No. 2 carbon hearing aid battery came.

 

 


 

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