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. 5 Carbon Hearing Aid Battery

The Great London No. 5 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 4½-volt battery was comprised of three large carbon-zinc dry cells in a black paper wrapping.

It measured 3½” high by 3⅛” wide by 1” thick and weighed 10¾ oz.
 

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Top view of the Great London No. 5 carbon hearing aid battery. There are no manufacturer's markings on this battery apart from the "05" on the bottom (see next picture), but as it came with a Great London carbon hearing aid, it was likely made for them.

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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Bottom view of the Great London No. 5 carbon hearing aid battery showing the plain black paper that covered the battery and the "05" on the bottom.

 

 

 

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