Looks like this user has no clue about the care and feeding of LiPo batteries.  Next he will probably stab them with an ice pick to deflate them.   

Im confused by this.

I always thought puffing of a battery was a good thing akin to how a bodybuilder puts on muscle. Puffing is a sign your batteries are working hard and are growing bigger to adapt to the load. Ive often felt I get more power, longer run times faster charging the more puffy it gets.
Obviously you need to factor this into your build to allow ( like a cg shift) battery swell. Most guys don't allow for this or even take advantage of the benifits of a MASSIVE lipo swell.

Forget 5S or even 6S : a puffy 4S will kill any piped .75 for power delivery. Its like a supercharged electric setup.

You guys dont know the 1st thing about Lipos
LIPO stands for Let It Puff OK

For every 10% of atmospheric swell I gain 10% more power reserve resonance to used anytime after the landing but before the next manouver.