Swollen Battery

My battery is original and beginning to lose autonomy, naturally I wanted to replace it. Not wanting to fall on a counterfeit so I chose a price a little above the other battery found (14)
After a few weeks of use, I opened the protective cover of my Note II to find that the battery had trouble staying in place.
Verdict: battery "inflated" for more security jai preferred return the original battery. A little research it is a phenomenon that appeared on certain Note II batteries.