IPhone 4s heats up and drains battery quickly after upgrading to iOS 8.1.2

Last Sunday i.e. on 14-Dec-2014 i upgraded my iPhone 4S (WiFI + 3G, 64GB) to iOS 8.1.2. Since then my iPhone's battery has started to drain out abnormally fast (it doesn't even last an hour after charging it fully to 100%) and the phone even heats up simultaneously.When checked under Settings> Usage> Battery Usage, i found the app-wise usage of battery like this: Phone (Audio) 36%, WhatsApp-24%, Home & Lock Scree-17%, Settings-7%, Messages-5%, Mail-4%, TOI-2%, Conatact-2%, and rest few apps 1% each. Prior to upgrading the iOS to 8.1.2, the battery life of my iPhone was normal: i just had to recharge once in 24 hours with normal usage of the phone. Could anybody help me to fix the problem? Thanks in advance. -BBS Ijam, GTK/SKM/171214

I think iPhone 4s is oLd now we need to update our as I will have to change my battery from repair center maybe this will solve the problem the new iOS are heavy for our phones.
*** I also have extra internal battery cover for my iPhone. I can't go out without that cover because my iPhone battery drain so fast from 100% it will be maybe 60 % so fast that is so annoying.
Long story short my iPhone is screwed up I think I don't trust my iPhone battery anymore.

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Hello Igor,
Thank you for posting in the Apple Support Communities. I would be concerned too if my iPhone were heating up and losing battery life quickly. There are a few articles I found that might help with what you are experiencing on your iPhone.
The first thing I recommend is quitting open applications. You can find an article with the steps to that here:
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http://support.apple.com/kb/HT5137
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Click ( www.apple.com/batteries/iphone.html) for tips on how to prolong iPhone's battery life.
Try turning iPhone off and then on again.
Connect iPhone to iTunes and restore iPhone.
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When charging iPhone, make sure to leave it charging until it is fully charged. You'll know the battery is fully charged when the battery icon in the upper-right corner of the screen looks like this .
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http://support.apple.com/kb/TS2802
I hope this helps!
Best,
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Why the iPhone 4 16GB drains out the battery faster after upgrading to ios 5?

Why the iPhone 4 16GB drains out the battery faster after upgrading to ios 5?

Not sure, but try this:
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When you're done, you may have better luck keeping a charge.
iOS 5 adds a lot of additional communication, and every time you connect wirelessly to anything, more power is used. Even so, some people report that a battery cycle like this helps. It seems to have worked for me.

My iphone 4s gets warm and loses battery quickly

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EtreCheck version: 2.0.6 (91)
Report generated 22 October 2557 BE 10:58:23 am AEST
Hardware Information: ℹ️
MacBook Pro (13-inch, Mid 2012) (Verified)
MacBook Pro - model: MacBookPro9,2
1 2.5 GHz Intel Core i5 CPU: 2-core
4 GB RAM Upgradeable
BANK 0/DIMM0
2 GB DDR3 1600 MHz ok
BANK 1/DIMM0
2 GB DDR3 1600 MHz ok
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
Intel HD Graphics 4000 -
Color LCD 1280 x 800
System Software: ℹ️
OS X 10.10 (14A389) - Uptime: 2:20:32
Disk Information: ℹ️
APPLE HDD HTS547550A9E384 disk0 : (500.11 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted> : 210 MB
QACI HD (disk0s2) / [Startup]: 419.25 GB (222.26 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
BOOTCAMP (disk0s4) /Volumes/BOOTCAMP : 80.00 GB (56.65 GB free)
HL-DT-ST DVDRW GS31N
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Apple Inc. FaceTime HD Camera (Built-in)
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Computer, Inc. IR Receiver
Thunderbolt Information: ℹ️
Apple Inc. thunderbolt_bus
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Gatekeeper: ℹ️
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[not loaded] com.devguru.driver.SamsungACMData (1.4.18 - SDK 10.6) Support
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DigidesignLoader: Path: /Library/StartupItems/DigidesignLoader
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[loaded] com.oracle.java.Java-Updater.plist Support
[running] com.wacom.pentablet.plist Support
[running] com.wacom.wacomtablet.plist Support
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[loaded] com.chasingsilver.dpprivilegedhelper.plist Support
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[running] com.digidesign.fwfamily.helper.plist Support
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[loaded] com.microsoft.office.licensing.helper.plist Support
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[loaded] PACESupport.plist Support
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[invalid?] com.adobe.ARM.[...].plist Support
[loaded] com.google.keystone.agent.plist Support
[invalid?] com.spotify.webhelper.plist Support
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Unity Web Player: Version: UnityPlayer version 4.3.7f1 - SDK 10.6 Support
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WacomTabletPlugin: Version: WacomTabletPlugin 2.1.0.2 Support
AdobePDFViewerNPAPI: Version: 11.0.09 - SDK 10.6 Support
FlashPlayer-10.6: Version: 15.0.0.152 - SDK 10.6 Support
Silverlight: Version: 5.1.10411.0 - SDK 10.6 Support
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SharePointBrowserPlugin: Version: 14.1.0 Support
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Digidesign CoreAudio: Version: 8.0.5 Support
3rd Party Preference Panes: ℹ️
Digidesign Eleven Rack Support
DigidesignMbox2 Support
Digidesign Mbox 2 Pro Support
Flash Player Support
Flip4Mac WMV Support
Java Support
Perian Support
Time Machine: ℹ️
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Destinations:
LaCie [Local]
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832 MB Wired RAM
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My battery drains really quickly after upgrading to OS X Yosemite

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Any iPhone 4S users experienced better battery life after upgrading to iOS 7.1?

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What's the resolving fix?

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After the upgrade battery level goes from 100% to 0% in 5hrs basically in standby. I have turned off push services, data connections, icloud...everything. iPhone still drains battery and gets quite hot. Any suggestions?

Same here - mine went down to 0 in 8 hours - not good news

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HT4623 iPhone 4 (2011) very sluggish and battery issues after upgrading to iOS 7

Hi,
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rajivrp wrote:
Hi,
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Try This...
Close All Open Apps... Sign Out of your Account... Perform a Reset... Try again...
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rajivrp wrote:
- Is there any way I can go back to previous version ...
Apple does Not Support Downgrading... Never has.

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IPhone 4s heats up and drains battery quickly after upgrading to iOS 8.1.2

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