Luckily I have no battery problems with my 4S, but it is disappointing that some people are having battery issues. Hopefully Apple will fix it soon. In regards to the OP, I would disagree with his reasoning that somehow Apple testing would have discovered such issues. Corporate testing is not real world testing. Engineers have no way of predicting what will happen when products get into the consumer's hand. If you claim to be from the corporate car business, you should know this better than anyone. I work in the luxury car retail side. Car manufacturers spend millions and years to design, develop, produce, and countless miles of road testing and yet unanticipated problems arise once the cars reach the retail level. I've seen everything from dash rattles to excessive wind noise to loose trim pieces to failed electronic components. Based on your reasoning these things shouldn't happen because of corporate testing, but unfortunately they do. I wouldn't worry too much on the battery issue, since Apple has done a nice job supporting its products and providing fixes.