Eveready Counter-Top Battery Tester
This Eveready counter-top battery tester was used in the mid to late
1940s by hearing aid sales and repair establishments to test A and B
batteries for customers.
The batteries were tested by pushing the battery
down on the A and B battery plugs on the top of the unit.
Internal type
A and B batteries could also be tested using the supplied cord with a probe
that could be touched on one battery terminal while the other terminal
was touched on the contact on the top of the unit.
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