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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

The Ardente No. 77 was a 3-volt hearing aid battery used in carbon hearing aids in the 1930s.

The Ardente Model 77 carbon-zinc battery weighed 3¾ oz, and measured 2⅝" high by 1⅝" wide by 13/16" thick.

The label says it was "specially made for use with Mr. R. H. Dent's Ardente for Deaf Ears" hearing aids.

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Left side view of the Ardente No. 77 battery showing the model number.

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The Ardente No. 77 battery had springy brass battery terminals to make firm contact.

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Top view of the Ardente No 77 battery showing the positive terminal (+) on the left.

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