My iPhone keeps on shutting off at 20% battery

This is even happening with me. Since the ios 7 update there r sudden falls in the battery life like from 70% to 61% and then 50%. I am not able to use my iphone as it shuts down within 2 hours of use. Plz help someone

I'd just like to say that ahs70's post on Dec 1, 2013 at 1:17am on Pg. 9 worked for me as well: https://discussions.apple.com/thread/5338609?start=120&tstart=0

If your iPhone's battery is acting up you need to determine if it's a software issue or a hardware/battery issue. To do that, after syncing your iPhone, erase/hard reset all data and settings from your iPhone to what it was from the factory as new. This can be found in Settings/General/Reset/Erase All Content and Settings. Then test it out for a day or two. If it's still acting up then it's likely a hardware issue and you will need to get your battery replaced. If your warranty is done than check out this link to get a battery kit to replace your iPhone battery yourself: http://www.ifixit.com/Store/iPhone/iPhone-5-Replacement-Battery/IF118-001#produc tDescription

If your iPhone is now working properly after hard resetting it than it's most likely a software issue. This battery issue only started after upgrading to the new iOs7, so it is obviously related to the update not properly installing itself. What has worked for me and many others is to manually update to iOS 7.0.4 using the full downloaded version of the update which is about 1.32 Gigs.

But first you need to find out what model of iPhone you have, click here to determine if it's GSM or CDMA: http://support.apple.com/kb/HT3939?viewlocale=en_US&locale=en_US

Then go here and scroll down to download the iOS 7.0.4 complete update for your device: http://www.downloadios7.org/download-ios-7-0-4-ipsw-file.html

Then scroll up on the download page and follow the instructions of updating your iPhone manually following the instructions below: "IPSW with iTunes"

And your done.

Problem solved.

I only posted this because it was a very frustrating problem that no one really seemed to figure out a solution for.

I hope this helps.

Emile Beaulieu

You actually don't need to do a hard reset and erase all your data and settings on your iPhone-this step is to simply determine if it's a software issue or a problem with the battery. You can skip the hard reset step and just manually install the full 1.3gig downloaded version of iOS 7.0.4 on your iPhone with all your data and settings on it already. This should fix it if it's a software issue and this way you can keep all your data and settings without having to start over again and lose everything.