How to test an alkaline 1.5V AA battery?
I've been collecting used batteries from the wireless microphones at church. I'm sure some of them can be put back into the "used" bucket for relatively confident usage, and others need to go bye-bye.
The question is how to effectively test them for that decision.
I'm guessing they would require a current load equal to the microphone requirements and then observe the voltage.
And another question would be, how long to load the battery for an effective test?
One more question would be, at what voltage is a 1.5V AA battery considered "dead"?
Thanks for any input.