Eveready No. 742 "A" Battery
This
is an Eveready No. 742 1˝ volt "A" battery typically used in
portable radios (receivers), but also could be, and was, used as the "A"
battery in a number of vacuum tube hearing aids.
Using this giant "A" battery gave much longer battery life.
On the bottom of this battery it says "For best results, put in
service before May 1946".
It weighed 1 pound, 4 oz., and measured 2˝"
by 2˝" by 4" high.
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