Apple acknowledges battery life issue in iOS 5, promises a fix

Ever since Apple released iOS 5 to users there have been a lot of complaints, particularly from iPhone 4S users, regarding the disappointing battery life on their iOS devices. It has been more than a couple of weeks now but Apple refused to comment on the situation, until now.
In a statement given to AllThingsD, Apple acknowledged the issue and promised to release a software update in a few weeks to solve the issue.

At about the same time that Apple acknowledged the issue, they also seeded iOS 5.0.1 beta to developers. Among many things, this update the battery life issue in iOS 5. Other changes include addition of multitasking gestures in the first generation iPad, resolved bugs with documents in the Cloud, improved voice recognition for Australian users using dictation and other security improvements.

You can get the update from Apple's developer site if you're a developer or wait for a while till it becomes available to you.