Instructions on how to use a multimeter are out of scope of this Instructable, you can find some information here: I will attach some pictures of measurements in action. Try to use batteries that have same amount of energy stored in them.Īnother tip: I sort my batteries according to Voltages, 1.35+ Good, 1.2V-1.3V Ok (but almost out), 1V-1.2V Discard. Tip : do not use old and new batteries in the same device at the same time. Otherwise, properly discard of the battery. If the reading is more than 1.3V for alkaline battery (not rechargeable battery) then the battery still has some juice left in it, don't throw it away. Notice the voltage reading on the voltmeter. With the battery in front of you, put the red probe to battery's nipple (+) and the black probe to the battery's flat side (-). To test the battery, turn on your voltmeter, put the voltmeter on DCV and make sure that it is far above the battery voltage, on most voltmeters there is a setting "20" in the DCV area, so switch your voltmeter to that setting. The proper voltage for AA/AAA NiCd/NiMh rechargeable battery is 1.25 Volts The proper voltage for AA/AAA alkaline battery is 1.5V This electronics tip has to deal with checking common alkaline AA/AAA batteries or AA/AAA rechargeable batteries for proper voltage with a voltmeter.ĭisclaimer : some people might say that a battery should always be tested under load but I have found that in most common household applications this is insignificant and will not change the results of the testing too much. If we don't know how to check a battery we might throw out a perfectly fine battery (especially when we have a pile of them somewhere in the drawer). We all run into a situation when batteries in our remotes, toys, keyboards/mice run out.
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