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| Why Battery Voltage Varies Between Different Testers? |
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| Boris_yo:
Hi. Tested new alkaline battery 1.5v and here are the readings I got: 1. Chinese battery tester: 1.27v 2. Aneng brand Chinese battery tester: 1.50v 3. Chinese multimeter: 1.53v Used lithium AA single-use battery: 1. Chinese battery tester: 1.23v 2. Aneng brand Chinese battery tester: 1.48v Tested Sanyo 2500mAh barely charged AA battery: 1. Chinese battery tester: 1.03v 2. Aneng brand Chinese battery tester: 1.11v Tested 9v alkaline rectangular battery: 1. Chinese battery tester: 8.85v 2. Aneng brand Chinese battery tester: 9.12v It seems that while multimeter puts on zero load, the battery testers put a tad bit. Though why readings between both battery testers vary? |
| Ed.Kloonk:
Are these 'testers' analog meter variety? The cheaper the meter component the more inaccurate they are. A analog meter is supposed to considered *most accurate at FSD (full scale deflection). Connect them to a good variable power supply and set the output to what the maximum range the meter should read. If that is anywhere near accurate, then check the meter at 1/4, 1/2, 3/4 range to see how good it is. edit: most |
| WattsThat:
Yes, battery testers load the battery, a multimeter/DMM does not. |
| Ed.Kloonk:
--- Quote from: WattsThat on September 18, 2022, 04:32:22 am ---Yes, battery testers load the battery, a multimeter/DMM does not. --- End quote --- I see now the question asked. Disregard my answer. Sorry. |
| tooki:
--- Quote from: Boris_yo on September 18, 2022, 04:12:06 am ---Hi. Tested new alkaline battery 1.5v and here are the readings I got: ::snip:: It seems that while multimeter puts on zero load, the battery testers put a tad bit. Though why readings between both battery testers vary? --- End quote --- Yes, a multimeter places essentially no load, while a tester places a load. As for the differences — well, think about it for a moment: what would cause a difference in measured voltage? Give us your hypothesis and we’ll let you know if it’s right. |
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