ende4171 thanks for that link. It's all there. They suggest several applications for a given cell eg: toy, flashlight, remote, etc. Then they give the estimated load in ma, and ohms for each application and the terminal voltage for that application. For 1.5V alkalines it ranges from .8 to 1volt for end of life. The only trouble is they use industry terminology rather than the common names. An LR3 is what we all call a AAA. With so many types, I should probably make a chart and install a multi turn pot in a little box with a metal pad and one test lead. Switch to ohms, set pot, switch to volts, test. Yes, I know it is a good way to zap the ohms scale in the DMM. Thanks again.
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