Zenith No. Z-1 Hearing Aid "A" Battery
This Zenith No. Z-1 1˝ volt hearing aid "A" battery was used in
Zenith
vacuum tube hearing aids in the 1940s.
It weighed 6˝ oz., and measured
3⅞" in height by 1⅜" in diameter.
This battery was paired with a Zenith Z-30 45 volt "B" battery in
2-piece vacuum tube hearing aids.
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