The fact, that iPhone 4S has problems with battery life, is not news for its users. But after releasing iOS 5.0.1 update , the users hoped that problems would be eliminated.

However, the problem has still occurred and some users are complaining about the issue. Apple continues working on the problem, its spokesperson Trudy Muller reported:
“The recent iOS software update addressed many of the battery issues that some customers experienced on their iOS 5 devices, we continue to investigate a few remaining issues.”

via macworld