I have 4 AAs from 2005 and 4 from 2010. Is there a way to find out which are the bad cell(s)?
They still work with somethings like remotes etc. With my external camera flash the recycle times are slower, but with my film SLR after 3 days and it doesn't work.
I have tried using a multimeter and they all register 1.4V or 1.38V I mean all 8 of them, which was the same as my brand new batteries (Panasonic Eneloop - bundled with a charger) I just got 2 days ago and the same as my few months 2x AAs (Energizers).
My older battery charger has a discharge or test function and one set of 4 AAs registers ~1,600mah and the other set ~2,100mah.
FWIW, the Panasonic Eneloop charger has status lights. All 8 AAs were blinking red and cannot be charged but they can be charged with my other charger. So is this a reliable enough way to say that those all 8 are bad? My brand new 4 AAs Eneloops and the few months old 2 AAs were charging fine in this Panasonic charger.
Could it be that if the charger is discharging them to test their capacities after freshly charging them won't work b/c the batteries are freshly charged. The batteries only go bad after some days or under very high load like a camera flash?
Any thoughts Cheers