How To Measure A 9v Battery With A Multimeter. Touch the black multimeter probe to the negative terminal of the 9-volt battery. Mar 14 2001 3.
If you connect a load then the voltage at the terminals of the battery drops because the internal resistance is in series with the load. A multimeter a resistor and a stopwatch can be used to measure a batterys mAh rating as well as its elapsed time. Connect the test probes to the battery.
Select DC voltage measurement for testing a battery.
Your computer should be turned off and the battery should be removed. Multimeter to check laptop battery chargeFully charge your laptop battery with a Multimeter. Multimeter to check laptop battery chargeFully charge your laptop battery with a Multimeter. This is much higher than the internal resistance of the battery so you read the true voltage of the battery.
