I know I'm bringing back the dead here but yesterday I started going through ALL my batteries and testing them on my charger.
It was a good thing I did....the results were surprising. Batteries which I thought were still good were not. In once case a 2050mAh AA battery tested at less than 800mAh.
I also had some brand new 700mAh AAA batteries (cheap brand which came with the charger) test at less than 400 each.
I'm only 1/2 way through and so far only 8 batteries have tested to anywhere near their labeled capacity...I've tossed quite a few. I'm very tempted to suck it up and order all new cells online...get something I know is good quality like Enveloops.