Shorted Cell

I would think the bad cell would show something. Did a solder joint blow off?

I'm inclined to agree with this.I have to wonder whether zippy uses the same thin tabs on their cells as I have seen on other budget lipos.In which case I would think you could melt a tab off the cell,duplicating your results,and the cell could possibly still be good.But there's only 2 ways to tell,split that sucker open,or send it to someone who will.