I'm going to buy this summer, if I am not convinced that they will release on Friday, and not as the battery goes, but with the other phones I've had, and have been a few, all happened to me at the beginning I did not last the day, and it ends up lasting about a week. Anyway, I think the Xperia S battery does not arrive a week or joke, at best, I estimate about 2 or 3 days ...