Ever since iOS 5 and the iPhone 4S with iOS 5 pre-installed were released, customers have been complaining about poor battery life. It appears that something in the iOS 5 update has directly affected the batteries performance.
Apple has been relatively quiet on the matter until now. AllThingsD received an official statement from the company confirming the problem.
“A small number of customers have reported lower than expected battery life on iOS 5 devices. We have found a few bugs that are affecting battery life and we will release a software update to address those in a few weeks.”
Apple seems to be taking the issue seriously and wants customers satisfied, so they have already seeded a 5.0.1 update to developers. The new software contains fixes for the reported battery bug, as well as iCloud and Siri Dictation.