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How do I end tasks on the iPhone 4?

I want to save battery by closing background tasks on the iPhone 4.

Most Useful Answer JanSt  Oct. 17, 2011 at 13:32

You can't! Jailbreaking the iPhone lets you install SBSettings - that lets you "kill" apps and background processes, and then some. Without jailbreak you can only minimise apps and hope for the best.

For increased battery life it is more important that you keep backlight to a minimum. Untick automatic backlight blah blah in settings and see how low you can manually notch it down.
Also: only enable wifi when you know you are going to use it. Most importantly, turn off 3G unless you need to stream videos or download large email attachments or visit heavy websites. You do not need 3G for calls, sms, emails, twitter etc. And 3G is just behind the big bright screen in battery wastage.

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JanSt / MOD  Oct. 17, 2011 at 13:32

You can't! Jailbreaking the iPhone lets you install SBSettings - that lets you "kill" apps and background processes, and then some. Without jailbreak you can only minimise apps and hope for the best.

For increased battery life it is more important that you keep backlight to a minimum. Untick automatic backlight blah blah in settings and see how low you can manually notch it down.
Also: only enable wifi when you know you are going to use it. Most importantly, turn off 3G unless you need to stream videos or download large email attachments or visit heavy websites. You do not need 3G for calls, sms, emails, twitter etc. And 3G is just behind the big bright screen in battery wastage.

Stelph  Oct. 18, 2011 at 12:50

Agree with JanSt - when jailbreaking SBS settings is a godsend as it quickly allows you to do all these things from one swipe screen, but essenitally even without jailbreak just make sure you switch off all non-essential fucntions when not using them. I am constantly amazed how long the 3gs can last when data and 3g is switched off

JanSt / MOD  Oct. 18, 2011 at 14:33

Stelph, true - 3G is such a killer. My Htc HD2 lasts 3 days on 2G! 8hours with 3G on.

emmajk42 / MOD  Oct. 18, 2011 at 17:59

Well you sort of can... pressing the home button while in an app does not close the app.

So double click the home button until the bar appears along the bottom, of recently used apps. Press and hold on an app until it wobbles, and then click the little red X at the corner of each app. All the apps in that tray are still running in the background and closing them in this fashion might help with your battery life.

JanSt / MOD  Oct. 19, 2011 at 07:05

Thanks, Emma. I forgot all about that. But by the way - apps closed that way still sometimes are listed as 'open' in SBSettings.

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