I'll just throw this in here too...
I have retired my first battery this morning.
It had absolutely no swelling at all and had 31 cycles total. I had checked the cells at full charge and the low one was 200 mw from the next lowest. That's too much. So I did the deep discharge all the way down to 3% and all the way back up. It seemed to repair the bad cell somewhat - now it was only 100 mw from the next lowest (my understanding is it should be less than 70 mw). But also the mAh dropped by about 100. So I figure I should retire it. But first, just for fun, I'll deep discharge it again - maybe it'll repair it some more and bring it within acceptable range? So I did and there was no change - still 100 mw off - EXCEPT that the mAh once again dropped by an additional 100 mAh. So I'm putting this baby to rest.
Which is sad because it still shows 90% life left.