"Tom's Thumb" or a dime is bigger than a new hearing aid mercury battery developed by General Dry Batteries, Inc., Cleveland. This battery makes transistor hearing aids more efficient and economical to use. It is the world's most powerful miniature commercial battery.

Digital Commonwealth — Boston Public Library

"Tom's Thumb" or a dime is bigger than a new hearing aid mercury battery developed by General Dry Batteries, Inc., Cleveland. This battery makes transistor hearing aids more efficient and economical to use. It is the world's most powerful miniature commercial battery.

[ca. March 1955]

RightsCC0 — Public Domain

CollectionDigital Commonwealth — Boston Public Library

[Information from item housing] Hearing Aid

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