|Written by Lifeengineer|
A voltmeter is very useful for testing household batteries.¬† Some voltmeters have battery tests in mind when they are designed since labeling for a battery test is included on the dial settings.¬† A voltmeter can be purchased for less than $5 at most hardware stores so it very be a very inexpensive device for testing batteries, but they are much more accurate than using the test strips built into some of the battery packaging.¬† Follow these easy steps to use a voltmeter to test a battery.
STEP 1: Find all the old batteries you need to test.¬† One you test a single battery, testing a bunch more takes no time at all.
STEP 2:¬† Plug in the + Red probe and -Black probe, if needed into the voltmeter.¬† Some voltmeters have the probes permanently attached.
¬†STEP 3:¬† Set the voltmeter dial setting to battery test if there is one on the meter.¬† If not, set the meter to DC voltage and use the lowest setting, such as 10.
STEP 4:¬† Hold the +Red probe to the positive side of the battery.¬† The positive side will be marked on the battery with a "+".¬† Hold the -Black probe to the negative side of the battery.¬† The negative side of the battery will be marked "-".
STEP 5:¬† Read the voltmeter.¬† For AA, AAA, C, and D batteries a result of anything less than 1.5 volts means the battery is bad.¬† For 9V batteries, you will be looking for a 9 volt reading.¬† These values will be slightly lower if you are testing rechargable batteries.¬† Using the voltmeter to test batteries is an easy task and can be performed quickly.