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

Rayovac 357 Mercury Hearing Aid Battery

This Rayovac 357 1.4 volt (?mercury) hearing aid battery was made by Rayovac Corp. of Madison, WI. probably around 1955.

This battery weighed around 0.05 oz. (<1 g), and measured 0.455" in diameter by 0.205" in height (1.15 x 0.5 cm).

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Top view of the Rayovac No. 357 hearing aid battery showing the negative terminal.

 


 

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Bottom view of the Rayovac No. 357 hearing aid battery showing the model no. (357), the manufacturer's name (Rayovac), the positive terminal indicator (+) and at the bottom "Made in USA".

 

 

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Side view of the Rayovac No. 357 hearing aid battery.

 

 

 


 

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