Old style/slow/dumb chargers, the kind that take many hours to charge, are….very…slow/low output, and may never shut off, are worth having around for this. The will attempt to charge anything that will fit. Boost the ‘dead’ battery with one of these for a few minutes, and it will generally be recognized by a good smart charger then. Had to do that to 2 AAA cells from a used home phone system I got yesterday. All batteries being cycled and tested now.
If dumb charger does not work, do the parallel charge with another cell. If THAT does not work, you do have a dead cell.
Thanks everyone, I solved and recovered the battery that was not working. I practically put 4 other batteries in charge and as soon as they were ready the battery was finally recognized by the battery charger and it was therefore possible to recharge it.
Did the capacity of Eneloops improve for the 5th generation standard Eneloop White?
Interesting that the new packaging states "NEW CAPACITY min. 2000 mAh" and "NEW CAPACITY min. 800 mAh" (but there is also a *1 symbol next to the word "min." and I wonder what that means).
For Eneloops I have recently purchased in the USA (I'm not sure which generation they are):
The packaging for AA Eneloops lists "Capacity up to 2000 mAh" and the battery wrap on the AA Eneloops states "min. 1900 mAh":
Could someone measure the diameter compared to older generation. I have some devices that are a tight fit. Wondering if the extra capacity requires bigger battery.