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Question: Measuring Internal Resistance of small household batteries

Question: Measuring Internal Resistance of small household batteries

Hi, is there any difference in accuracy between a $3000 Hioki and a
$200 Rim (Germany) internal resistance battery tester, for testing
alarm or camera (lithium) and gel cel (UPS) batteries?

I have other questions: Does the meter reading differ, with the State
of Charge of the battery under test?

Is such a tester worth buying, for a hobbyist? Any advice appreciated,
thanks in advance.
 
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