Not having to charge many NIMH batteries yet, at what voltage should I consider AA 1.2 volt batteries no longer any good. I know with Li ion the 18650’s I use is anything under 2.5 volts.
I have some GP Recyko’s which reviewed to be similar to Eneloops. They are only 4 months old and this was the first charge. I use a Nitecore i4 charger. 2 charged fine and gave a 1.4 volts when finished but 2 seemed to fail during charging. When tested, one is 0.1 volt and the other is 0.5 volt.
Does this mean that these are no good?
I think the prolem is the charger, it thinks they are damaged. but if you use them in other charger, they should charge.
I don’t know if letting them discharge up to these low voltages damages them, but i don’t care much. many times i left a light on and forgot it, the batts were 0.something… all the batts are still working fine
Thanks for your responses. I still think it’s the batteries. The charger has charged other AA’s today and 18650’s and not any problems yet if I put these 2 in again, they fail. I also noted that I put 2 sets of 4 batteries into 2 lights at the same time. All the batteries were new. I didnt think to check the batteries before hand. The light that had these batteries went flat first and the other light is still going strong. Anyway, I was really just checking to see if NIMH gave an indication that a cell was no longer any good when it gave a low reading like lithiums do.
Read the second line below the heading “Measurements”. Review of Charger SysMax/NiteCore i4 V2
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You may have to try a dumb charger as suggested above to bring them up to voltage.