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iPhone 4S Poor Battery Performance SOLVED!!

I found the issue with the iPhone 4S battery performance.

I bought 2 iPhone 4S models on the first day. One for my wife and one for me. The strange thing was that mine would kill the battery in 4-6 hours and ran VERY WARM to the touch. My wife's phone worked great. It was cold to the touch. She would forget to charge it at night... and the battery performance was great... even better than our prior 3GS models.

What was the difference? I have my phone connected to Exchange for my corporate email. But exchange is not exactly the problem. The issue is in Notification Center. For some reason, I had hundreds of calendar reminders that kept refreshing on notification center. Furthermore, the reminders would flicker between the time remaining and the start time for the event at such a fast rate that it could not be read... (clearly a bug)

What is the solution? Go to Settings>Notifications>Calendar and disable Notification Center. You can still have the "alert style" set to Banners, or Alerts and you will still receive notices about your events, but it will not BUILD a summary in the Notification Center drop down screen. This is where the BUG exists. [Oddly, this does not affect my iPad 2, but is an issue for iOS 5 on the iPhone (different builds, maybe?)]

So, it appears that Notification Center has an endless loop in collecting the calendar events from Exchange and this is burning up our 4S batteries. Once you stop the madness from Notification Center, your iPhone 4S will perform as advertised.

Enjoy!

Tim

iPhone 4S, iOS 5

Posted on Oct 28, 2011 10:05 AM

Best reply

Michael Pardee

Level 2

270 points

Posted on Oct 28, 2011 10:08 AM

I'm trying this immediately as I see the same crazy flickering with events. Thanks for the tip. Hopefully this helps.

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61 replies

vaa0829

Level 1

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Jul 12, 2012 4:50 AM in response to TimothyW

I have a New iPad which is Wifi only. The first 4 weeks I had it the battery life was spectacular. I used it often (I use it for business) and the battery lasted about a week. I charged it last week, shut it down after I charged it, did not pick it back up for a week, and the battery was fully discharged. I did a similar experiment yesterday, charged it fully, used it a bit (battery went from 99% to 50% in a about 90 minutes) and then shut it down fully at 50%. This morning when I turned it back on it was at 25%. It went from 50% to 25% while it was turned off!!! How can this device go from hanging at 90+% for days to draining half the battery life while it is turned off!

When a similar thing happend with the iPhone 4 about a year or so ago, it was coincidal with an OS upgrade. I'm wondering if the same is true for the New iPad.

I need this device to work so any help would be appreciated...by the way turning off location services did not make any discernable difference.

iPhone 4S Poor Battery Performance SOLVED!!