Are battery test readings accurate?
Only if the tests are done while the batteries are delivering the proper amount of current to the detector. Some cheap battery testers, and even some more expensive meters, may give erroneous results when used to test batteries that are not delivering current during the test. An audio test is much more reliable since the audio circuitry loads the battery to the detector’s full power while the test takes place.
Only if the battery test is done while the batteries are delivering the proper amount of current to a load. Some “drug store” battery testers, as well as a good volt meter may yield completely erroneous results due to the fact the batteries are not delivering current during the test. An audio battery test is probably the best, since the audio circuitry loads the battery to the detectors maximum amount of power delivered while the test takes place. Also since batteries can tend to rejuvenate some of their performance after a long rest, it is best to test the batteries after they have been used for at least ten minutes.
Only if the tests are done while the batteries are delivering the proper amount of current to the detector. Some cheap battery testers, and even some more expensive meters, may give erroneous results when used to test batteries that are not delivering current during the test. An audio test is much more reliable since the audio circuitry loads the battery to the detector’s full power while the test takes place.
