removable li-ion battery for Samsung Galaxy S4.
pay attention to these tips: 1-don’t heat it directly or in boiling water. 2-don’t hit on it or push on the battery. 3- get it out of sight of your children and even pets. 4- don’t work with your phone for a long time while it is too hot because heating too much could lower battery’s ability. and put it in recycle bin after expiration date.