I have a large inventory of AA Eneloops of varying age and the Powerex 8 cell “smart” charger. In preparation for a liveaboard trip this weekend I set out to charge them since I’ve not been in the water for a month. Something has gone wrong as the batteries never complete the charge cycle, whether a normal fast charge, a soft charge, or a reconditioning cycle. I’m guessing it’s the charger, since this is happening regardless of the age of the batteries. Does anyone know how to test the charger, or if this is a known issue with (hopefully!) a known remedy? I am in Fiji and can only find super cheap 2-cell chargers which would not be ideal, I’m out of time to order a replacement, and I would hate to have to buy and pack 96 alkaline batteries at $4 a pop!

I have found that sometimes the battery end contacts form an oxide layer that increases resistance. Spinning them in the charger will help them to make better contact and complete a cycle.