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.