I have a 7.2v battery, and after I charge it , I use my battery volt tester, and it says the battery has 8.3v, and after the battery pack is almost dead, it says it has 7.3v. What does this mean? There's nothing wrong with my battery volt tester.
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The load that the tester applies on the battery is very small(a few micro-Amps) so even if the battery is dead for the device that operates with it,it will be ok for the tester. When a rechargeable battery is fully charged its voltage is 10% higher then the nominal voltage(only for rechargeable batteries). If you want to test the battery use a small load on it(a 12V/2W) bulb light and with this load on test it with the voltmeter! good luck!
