| billcarry | -- 03-12-2021 @ 11:40 AM |
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What should I see when checking battery voltage, six volt, everything shut off, recently driven, no light usage.?
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| 1931 Flamingo | -- 03-12-2021 @ 11:44 AM |
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Probably about 6.3 volts. Paul in CT
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| TomO | -- 03-13-2021 @ 7:56 AM |
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If the battery is good and fully charged it should read at least 6.3Volts at 50 F or higher. That said, a sulfated battery can read that voltage and not deliver enough power to crank and start the engine cold. In order to know the condition of the battery, it must be tested under load. You can get a rough idea of battery condition by charging your battery and then connect your meter across the posts while cranking the engine with the starter with the ignition off. Your meter should read at least 5 volts and when finished cranking should return to about 6.3Volts. If your results are different from these, you should have a load test performed on the battery. Tom
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| therunwaybehind | -- 03-13-2021 @ 8:58 AM |
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Chemically, all lead acid wet cells should produce 2.2 volts so a "6 volt" battery at full charge as indicated by a hygrometer should indicate 3 times that for a value of 6.6 volts. This why a voltage regulator for a DC generator to charge such a battery should be set at 7.2 volts. Such batteries in their hey-day only lasted 12 months when purchased as wet. When sold as dry-charged with the acid in a separate package that had to be added to the individual cells at point of sale they typically had a warranted life of 36 months. Note: After the dry charge electrolyte was installed to activate the battery it also needed to have an initial full charge applied from a battery charger to achieve a full life. My experience was with Atlas brand batteries as sold by Standard Oil of Indiana gasoline stations in 1956-1965. This message was edited by therunwaybehind on 3-15-21 @ 9:31 AM
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