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voltage or the OC voltage doesn't return to pre test state, the load is to o high for the battery in question or the battery is shot. Old School batt ery testers used to use a switch to select which resistor to load down the battery in question, AA, AAA, C, etc., while displaying the battery voltage on the meter. The only time I saw the meter drift downward was if selectin g a D battery test for a AAA for instance.
u want to know what state it's in after the test you'd use the last voltag e reading. But there's no point, if it's dropping noticeably either it's ha d its day or the test load is too high.
ts
that's all good if you want precision. In a lot of cases it's enough to see that oc voltage is down or it's drooping under load a good bit so it's sho t.
NT