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Also, NiMH batteries can reverse charge and ruin themselves. This happens a lot when batteries are in series and the load will continue to run the batteries unt

Also, NiMH batteries can reverse charge and ruin themselves. This happens a lot when batteries are in series and the load will continue to run the batteries until 0 voltage. The weakest battery will deplete first but then the other batteries will continue to pump current through until that weak battery reverses polarity and wrecks itself.

hilbert42 5y ago
Correct, ages ago, I was testing a batch of them and came across several reversed charged ones. At first I thought I must have got my multimeter leads reversed but I found that was not the case. For a long while I kept them to prove the point to anyone who thought I'd must have lost my ability to distinguish plus from minus.