It happened over a few charges and yes it spilt at the seams on the side. I noticed the pack puff a little but wasn't too worried about it. Charged it the night before flying and when going to install it into the model the next morning I noticed the seam split and electrolyte coming out under the shrink wrap. It was also bulging around the split. The pack was stuffed. [&:]

When I see something like this in a LiPo it's goneski! Not worth loosing a model over a $15 battery...

Cheers,
Jason.