This battery is unfortunately sensitive to pressure. I imagine that there is by printing a short-circuit, however, am not an expert. The phone (SGS4) turns off after a brief screen flicker and can be again only after removing and replacing the battery start. Here I assume that there is a surge protection on the part of the phone. Thank God I got it just before sending the phone to Samsung service that not the phone, but the battery is faulty. Really annoying was also the support. Looks to me NEM prefabricated form to send only asking franked the battery sufficiently to the shop ... what actually does not pay if you do not live in Germany. That part was not the way 3 weeks old when started the problems. Well, I've paid my dues. Think the original (which is only half cost) is the better choice
