We previsouly reported that Apple has said that the battery issues faced by the iPhone 4S will be solved with the upcoming update. However, even after the recent iOS 5.0.1 Update most users are still complaining that the issue is not solved and for some users the issue has gotten even worse.
In reply to all this Apple said that:
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.
This hints that a new update will be coming shortly which MIGHT solve the battery issues faced by the iPhone 4S or the users can be told to wait for another update after that. Whatever the case, keep your chargers fully functional at all times.(Dailytech)