I bought a new battery for my Xperia Ray, as has long been my original battery adopted from time to time. Phone switched off simply, the battery level displayed never really corresponded to the actual ... You might think it was the phone. Sure partly with. But since I have the new battery, there were no crashes and more he holds at least as long as the old one, in my testing I have to admit even that he hold out longer than the old. And otherwise you can use the so nice as a replacement battery for which would have to load the phone otherwise NEM half a day.