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

National Carbon Co. (N. C. Co.) No. 430-E Hearing Aid "B" Battery

The N. C. Co. No 430-E hearing aid "B" battery was made by the National Carbon Co., Inc. (abbreviated on this battery to N. C. Co. Inc.) of New York. It was used in some vacuum tube hearing aids manufactured during the Second World War (1939-1945).

This 30 volt "B" battery weighed 2.9 oz and measured 2¾" high by 1 15/16" wide by 15/16" thick.

The inscription on the front reads, "Manufactured in accordance with War Production Board orders and designed for use with any make of hearing aid device which requires a battery of this voltage and capacity and which is equipped with suitable connectors."

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Rear view of the N. C. Co. No 430-E hearing aid "B" battery showing the positive (+) terminal at the top and the negative (-) terminal at the bottom.
 

 

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Side view of the N. C. Co. No 430-E hearing aid "B" battery.

The date stamped on this battery is October, 1945. Another battery is date stamped Jan, 1946 so they were still available after the war stopped for a few months.
 

 

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Side view of the N. C. Co. No 430-E hearing aid "B" battery showing its US patent numbers (1,797,161 & 2,272,969). The latter patent was filed in 1939 and the patent was issued in February 10, 1942

 

 

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Top view of the N. C. Co. No 430-E hearing aid "B" battery. The top and bottom terminals were identical so it was easy to put this battery in backwards with the polarity reversed if you didn't pay attention to the + and - signs. To make sure you didn't miss them, the + and - were on all four sides near the top and bottom respectively.

 

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Bottom view of the N. C. Co. No 430-E hearing aid "B" battery.

 


 

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