RE: 4000 mah lipos inflated?
My thinking on this would lead me to believe that if it were the battery at fault, one of the cells would be bad. No possible way would all three have the same problem and you were lucky enough to buy all three. I would think that it was caused by either soldering and too much heat transferred to the cell from the tab, or a wire came loose and shorted all three out.
Anyway, sorry about your luck, hopefully your new cells work out for ya.
Besh wishes.
C