General > General Technical Chat
Why Battery Voltage Varies Between Different Testers?
Nominal Animal:
--- Quote from: Boris_yo on October 04, 2022, 08:46:32 am ---Impaired conductivity of battery tester?
--- End quote ---
No. A battery is not a perfect voltage or current source, it has real world characteristics. Consider what those characteristics are.
SmallCog:
I suggest you probe the battery with the meter whilst it's being tested by the battery tester.
Theoretically you'll see more similar readings between the meter and tester as the meter will be reading the loaded battery
Kasper:
Measure the battery current during the battery test to check for differences between testers.
tooki:
--- Quote from: Boris_yo on October 04, 2022, 08:46:32 am ---
--- Quote from: tooki on September 18, 2022, 04:33:24 pm ---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.
--- End quote ---
Impaired conductivity of battery tester? I used electronics contact spray on the one giving lowest reading and it still does.
--- End quote ---
No, it’s not that.
--- Quote from: Boris_yo on October 04, 2022, 08:46:32 am ---Probably has some kind of internal resistance or crappy components.
--- End quote ---
Earlier, you mentioned the battery tester applying a load. That is correct. Now, what poses a higher load (= more current flow): a smaller resistance or a larger one?
Boris_yo:
--- Quote from: tooki ---
--- Quote from: Boris_yo on October 04, 2022, 08:46:32 am ---Probably has some kind of internal resistance or crappy components.
--- End quote ---
Earlier, you mentioned the battery tester applying a load. That is correct. Now, what poses a higher load (= more current flow): a smaller resistance or a larger one?
--- End quote ---
Are you talking about resistance of battery or impedance of battery tester?
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