Leader (Voltmeter) Battery Tester
The Leader voltmeter battery tester was made in the USA around 1945.
It measured 2" in diameter by ⅝" thick (5.1 x 1.7 cm) and weighed
1.9 oz. (52 g).
The positive prong (bottom) was fixed to the battery tester, while
the negative probe was on a short wire.
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Close-up view of the meter of the Leader voltmeter battery tester. The meter had
one scale that read up to 50 volts. This was enough to test the 45 volt
"B" batteries used in hearing aids in the early and mid 1940s, and the
30, 22˝ and 15 volt "B" batteries of the late 1940s and early
1950s.
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Close-up of the positive prong of the Leader voltmeter battery
tester.
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Close-up showing how the negative probe attaches to the case of the Leader voltmeter battery
tester.
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To test a battery's voltage, you touched the positive prong to the
positive terminal of the battery, and touched the negative lead (bottom)
to the negative terminal of the battery.
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