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Question: IOS-5 battery power drain issue

Did somebody notice a major power drain issue after iOS5 upgrade on iPhone4? Last night at midnight, it was ~90% charged. In the morning, it was 37% charged. By noon, it was dead. I didn't make even 1 call during this time. Connected to Wi-Fi at home and strong 3G signal. Bluetooth is off, location services are off, all that stuff. The same phone's battery would last for 40 hours with my normal usage with IOS 4.3.5. Anybody knows if any specific feature of iOS5 is causing this battery drain?

iPhone 4, iOS 5

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Oct 16, 2011 6:51 AM in response to HayriC In response to HayriC

Followed these instructions on my 3GS


1- Delete your email account(s) in Settings > Mail, Contacts, Calendars > Your Account > Delete Account

2- Reset Network Settings in Settings > Reset > Reset Network Settings

3- Reboot your phone by holding the sleep/wake (top) button then sliding to off.

4- Re-add the email account Settings > Mail, Contacts, Calendars > Add Account…

5- Turn push back on


And it so far so good. battery consumption is back to normal again. Well slightly higher than on ios 4 but that is to be expected no?


Am running the iPhone as usual, not disabling anything i didn't do on iOS4.



Thanks to HayriC

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Oct 14, 2011 1:25 PM in response to RakeshPDX In response to RakeshPDX

Upgraded my 3GS to IOS5 on Wed and now it runs out of battery after about 6 hours with no use, 4 hours or less with occassional email use. Had to recharge it 3 times yesterday, and after 4 hours today. That doesn't work for me since I'm on the road a lot. Not only that, PDF attachments, even small ones, take a while to load and are then blurry for a long time while it slowly sharpens the focus and sometimes it doesn't ever get sharp. Multi-page PDFs are now **** to try to read. This is with 5 bars of 3G coverage. Never had these issues until this upgrade.

Oct 14, 2011 1:25 PM

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Oct 15, 2011 1:33 PM in response to RakeshPDX In response to RakeshPDX

I have the same problem. In 4 hours the battery of my iPhone 4 has drained after having IOS 5 upgrade yesterday.

I tried nearly everything including deleting the mail accounts, switching off the iCloud and notifications but it didn't work. Resetting the network settings and restoring the iPhone have already been done by me. Any suggestion?

Oct 15, 2011 1:33 PM

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Oct 15, 2011 1:45 PM in response to RakeshPDX In response to RakeshPDX

Same here with my iP4. Noticed it was real hot and the battery drained quickly. I turned off locations, notifications and anything else like that and it started cooling off but at that that point it was down to 20% charge. Started out with a full charge and used the phone sporadically. I'm only talking only a span of about 4 or 5 hours.


iPhoNettie

Oct 15, 2011 1:45 PM

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Oct 15, 2011 7:56 PM in response to RakeshPDX In response to RakeshPDX

Updated to IOS 5 yesterday. Since then a charge will last about 4 hours & the phone is very hot. Tried a hard restart and a full restore. Turned off the ping. And still no improvements. Is this Apple's way to get us to buy a new phone? Did they intentionally sabatoge our phones? Makes me wonder. Any other suggestions?

Oct 15, 2011 7:56 PM

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Oct 15, 2011 9:10 PM in response to jbshortmd In response to jbshortmd

Here we go. The solution is below. Hope it will work for you too!


1- Delete your email account(s) in Settings > Mail, Contacts, Calendars > Your Account > Delete Account

2- Reset Network Settings in Settings > Reset > Reset Network Settings

3- Reboot your phone by holding the sleep/wake (top) button then sliding to off.

4- Re-add the email account Settings > Mail, Contacts, Calendars > Add Account…

5- Turn push back on

Oct 15, 2011 9:10 PM

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Oct 16, 2011 12:20 AM in response to RakeshPDX In response to RakeshPDX

Exactly the same issue o both a 4 and a 4S.

Battery drains almost in front of your eyes and only last about 6 hours on standbye.

Must be something to do with IOS5 as I noticed some comments suggesting Siri as the culprit, but obviously Siri is not on iPhone 4

Any answers back from Apple?

Oct 16, 2011 12:20 AM

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Oct 16, 2011 3:42 AM in response to RakeshPDX In response to RakeshPDX

After going into settings and adjusting Notifications and Apps in the Notification Center, and merging MobileMe into iCloud and making sure MobileMe is Disable my Battery life was extended.


Before bedtime....


I tested my battery by charging my iphone 4 to 100%, close all previous viewed Apps, then powering down and remain charging my phone for another half hour, and powering it back on and disconnecting it from the charger before bedtime. When i awoke 7 hours (Approx) i checked my phone and it was still on 100%, i didn't get any calls, and only got 5-8 emails.

Oct 16, 2011 3:42 AM

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Question: IOS-5 battery power drain issue