Since the launch of iOS 5, a number of users have begun reporting decreased battery life on their iDevices, and alongside it have been reports of battery life issues afflicting the iPhone 4S. We investigated the iPhone 4S' power consumption in our review, and found that power consumption is on par with or less than the iPhone 4. Nevertheless, we predicted that there were a combination of software issues afflicting a subset of 4S owners and users with iOS 5 installed. 

Today, Apple has confirmed to AllThingsD that this is the case:

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.

In addition, Apple has released iOS 5.0.1 beta today which includes note of these software fixes which will hopefully improve battery life for affected customers. In addition, the beta restores multitasking gestures for the original iPad, security improvements, and improvements to the data store policies for applications, among others.

No doubt iOS 5.0.1 will release in a few weeks after this beta gets its own soak period in the hands of developers. We'll be investigating to see how this updates impacts the iPhone 4S' performance in our own battery life tests.

Update: We just installed the iOS 5.0.1 beta on one of our own iPhone 4S' and noticed that the baseband firmware also gets a version bump (indicating a bugfix of some kind) from 1.0.11 at release, to 1.0.12 in the iOS 5.0.1 beta. 

Source: AllThingsD, Apple Developer Portal

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  • solipsism - Thursday, November 3, 2011 - link

    I personal haven't but this is a known issue with some developers. I haven't yet read about a resolution.
  • choirbass - Thursday, November 3, 2011 - link

    After updating from 4.3.3 to 5.0 a few days ago on my iP4, I had a dramatic increase in battery life. Going from 1% draining every few minutes under heavy usage, to every 10-15 minutes under the same usage conditions. Granted, it was jailbroken before, but many things were intentionally disabled in an effort to increase both battery life and performance.
  • hamsterkiller - Thursday, November 3, 2011 - link

    For me, heavy usage is, at least, screen on.

    Playing a game. Recording a Video. Looking Youtube. Surfing Internet.

    Are u saying that with heavy usage the phone lasts between 17 and 25 hours?

    You are the lucky one that his iPhone last much more than Apple specifications!
  • Souka - Friday, November 4, 2011 - link

    Friend has an iPhone4 she uses for work.

    After this update (to the cloud....)... she lost most of her gmail and work Outlook contacts.

    She went to an Apple store, their "Geniuses" said it's a Google/Microsoft problem.
    She went to a Microsoft store, they said it's an Apple problem.

    I agree...Apple problem.
    Currently she's trying to get her IT dept to restore her Exchange/outlook contacts.
    I helped her retrieve her Gmail ones.

    "It just works"... heh...
  • fdfgsfdf - Friday, November 4, 2011 - link

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  • fdfsxcvdcfdh - Monday, November 7, 2011 - link

    2011 NEW and BIG ON SALE NOW

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