Multitasking the biggest killer of the iPhone battery life?

Yeah, who cares?

And in reality, how many people "whined for multitasking"?????

Quite a few, but habitual whiners can't help it.

I ssupect it was more a case of Apple just wanting to "keep up with the Jones's" (ie Palm and Android).

Baloney. Multitasking has been supported since day one with the iPhone but 3rd party apps could not run in the background when 3rd party apps became available.

And as it is a simple ON / OFF setting in the System Files- WHY, WHY not let users just decide for themselves??????? (A simple ON / OFF in the Settins Menu)

Quit your whining and use the iPhone feedback.

http://www.apple.com/feedback/iphone.html

Multitasking with the iPhone has been supported since day one over 3 years ago, but 3rd party apps could not run in the background or be suspended when leaving the app until iOS4.

Before anyone is allowed to install iOS4 on a 3GS and before purchasing an iPhone 4, they should be forced to read the info included with this link followed by taking a test to ensure the info was read and comprehended, and if someone still calls the fast app switching bar and recently used apps bar a multitasking dock, the info should be stamped on their forehead so they see it when looking in the mirror, or their iPhone 3GS and iPhone 4 should be taken away from them with what they paid for the device credited. IT IS NOT A MULTITASKING DOCK. Very few apps can and will run in the background since there is no reason for the overwhelming majority of apps to run in the background, and just because an app is in the fast app switching or recently used apps bar or dock DOES NOT mean the app is running in the background.

http://whenwillapple.com/blog/2010/04/19/iphone-os-4-multitasking-explained-agai n/

Message was edited by: Allan Sampson

You said your battery was 50% after 11 hours.
That means you get roughly 22 hours of battery life from your usage.

So... I'll assume you never charge your phone and stay up and use it for more than 22 hours at a time?

I never understood why people want batteries to last longer than the time your awake.. just plug it in when you go to sleep.

How do you suppose what you provided (if even true) will help anyone whatsoever?

When you use the iPhone and the features included - the more it is used, guess what? The battery will drain faster. If the battery is draining unusually fast - a "rapid" battery drain, something else is wrong besides with iOS4 or EVERYONE with an iPhone running iOS4 would be experiencing a "rapid" battery drain, which is not the case.

Message was edited by: Allan Sampson

As I have witnessed some one who has the iPhone 4 and once he disabled multitasking he found vast improvements in his battery life,

Multitasking was disabled entirely? So this means he is now unable to receive or send SMS/MMS during a call, or receive or send email during a call, or access the internet or any other app during a call, or listen to music with the iPod while checking/reading/composing/sending email or surfing the web with Safari?

If not, multitasking has not been disabled.

Then multitasking has not been disabled. The only thing that has been disabled is access to the recently used apps dock or bar. This also means if he is using a 3rd party app that can run in the background, which can't run in the background with an iPhone 3G - with a 3GS or an iPhone 4 only, how does he plan on quitting the app separate from powering his iPhone off and on?

The overwhelming majority of 3rd party apps do not run in the background and will never run in the background since there is no reason for it or benefit.

A very small number of apps can and will run in the background which are very few and far between.

Multitasking has not been disabled on his iPhone since multitasking has been supported with the iPhone since day one over 3 years ago.

Allan Sampson wrote:
Then multitasking has not been disabled. The only thing that has been disabled is access to the recently used apps dock or bar. This also means if he is using a 3rd party app that can run in the background, which can't run in the background with an iPhone 3G - with a 3GS or an iPhone 4 only, how does he plan on quitting the app separate from powering his iPhone off and on?

He could still kill the app the old way, where you hold the power button till it asks you to slide to power off, and then hold the home key till it springs.

Because as YOU stated, all he did was disable the multitasking bar, so he cannot kill apps from that bar, not multitasking itself.

However, if he kills it the 3.x way, it will kill the app.

EDIT: And because I just tried it, and it works. Disabled the multitasking bar in the plist, opened an app that supported multitasking, and killed it the old way. Then reopened the app, and confirmed that it started anew, as if I had opened it fresh.

The parameter in the PLIST file is called "Multitasking" It can be set to either ON or OFF. It is used to by Apple to disable "Multitasking" in older devices (eg iPhone 3G) that cannot handle the extra resources needed.

Why else would Apple have a dedicated parameter to allow or disallow this "feature"

And YES, it DOES make a big difference on battery life if you disable it yourself. That is a fact- as I have tried me phone with "multitasking" both ON and OFF.