Is there a limit between a batteries internal resistance compared to another that would warrant them not being paired anymore in parallel or series in a flashlight?
I have a neat little tester, the SM8124A, that shows the IR difference between some batteries I purchased in groups of two or four. With one pair of Protected 26650's the IR for the first battery was 30 mΩ and for the second it was 37 mΩ. Seems close enough but is it still ok to use them together in a flashlight since it is still a difference of more than 20%?
I have a neat little tester, the SM8124A, that shows the IR difference between some batteries I purchased in groups of two or four. With one pair of Protected 26650's the IR for the first battery was 30 mΩ and for the second it was 37 mΩ. Seems close enough but is it still ok to use them together in a flashlight since it is still a difference of more than 20%?
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