I have this battery now for several weeks notice no difference in use and can by the runtime to the original Samsung battery. However, So therefore by itself very well, the battery, as already described by other people, a few millimeters thicker than the originals, so my sleeve no longer fits properly and now I can no longer use the buttons on the side optimally. That does not bother a bit. But on the whole, I am satisfied, therefore 4 stars.