4S battery life and getting hot

Hi
I am aware that there have been in the past battery issues/heat issues with iPhone 4S and iOS 6.
Device is ~2 years old. Brand new/unlocked from Apple. Under Apple Care warranty until October I believe. I bought it off a friend who upgraded to iPhone 5.
Recently the device has begun to have battery life issues and it gets warm whilst I am using it. When I stop using it and put it down, whilst it's locked etc it will eventually start to cool down. It's not so hot that I can't handle it but I can feel the heat through a plastic hardshell case and it obviously feels much hotter if I handle the phone when it's not in a case.
Couple of notable recent issues were last night I had 25% and then I opened the Facebook app and all of a sudden got the "Less than 20%" warning notification and it had dropped straight from 25% to 17% and today I've had the phone on for about 2 hours and it's already down from 100% to 58%
iOS version: 6.1.3
What I have done...
- Tried charging to 100% and then turning off data network and WiFi, then turning off the phone and disconnecting the charger and turning it on after about a minute or 2.
- Reset all settings.
- Charge to 100%/Backup/Erase all contents and settings and then set the phone up from scratch again.
What's on:
- Data network ...but I frequently turn this off/on because it cripples battery life so much for me now.
- iCloud sync but only for notes and contacts.
- 2 mail accounts
What's off:
- Safari (disabled in Restrictions)
- Location Services/GPS (also disabled the ability to change whether LS is on/off in Restrictions)
- Bluetooth
- Push notifications for most apps
- Push email. I have this set to fetch, manually.
What's sometimes used:
- Siri
- WiFi (remains Off when not in use)
Apps: I leave Facebook and Facebook Messenger logged out when I'm not using them. Push notifications are off for everything except Instagram and Snapchat but I use those very infrequently.
Anybody able to shed light on this or is it just that the phone is nearing the end of its life-cycle now at ~2 years and it needs to be replaced? I'm contemplating trying to find a 4 on iOS 5 and never updating it - I don't like 6. I really hope 7 is more gentle with batteries.

Did you transfer the backup for your 3GS to your iPhone 4S?
Try a reset, which is done by pressing and holding the home button and the sleep/wake or on/off button simultaneously until you see the Apple logo and then release.
If no change after a reset and you transferred the backup for your 3GS to your 4S, try restoring your 4S with iTunes as a new iPhone or not from a backup to see if this makes any difference.

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Could it be a hardware issue?
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Thanks

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Which iOS version are you using?
Settings > General > About?
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Yes I have.
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Puneet_Agg wrote:
I have bought a new iPhone 5s 16GB running iOS 8.1.2 3 days ago. The device that I have got has a poor battery life and WiFi connectivity. I have tried lots of methods given on the internet like turned off the auto-brightness, reset the phone to default settings.
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Battery Life and apps - specifically: Whatsapp, Gr...

Experiment: Smartphone battery life and Web 2.0 applications
Objective: To determine the battery life of a Nokia Symbian S60v3 {or ^3} phone under the use of web applications, the majority of which are social networking apps.
Apparatus: Nokia S60v3 FP1 (E90 Communicator, E71, etc) {or ^3 (N8, E7)}, Gravity, Nimbuzz, Nokia Email, Joikuspot, Whatsapp, MXit, BirdStep SmartConnect & Lights On. 3G/GPRS internet connection.
Method:
Install the latest versions of the softwares mentioned, activate Whatsapp (through sms). Use all apps as desired.
With Nokia Email, set sync period for wake/daytime only, i.e. when you are awake - say 06h45 to 22h45, daily.
For Network mode, select dual mode (S60v3: Menu/Tools/Settings/Phone/Network; ^3: Menu/Settings/Connectivity/Network)
At commencement of sleep period (first night), exit all apps. Set your alarm. In the morning, check Log (S60v3: Menu/Log; ^3: Menu/Applications/Tools/Log), scroll across to the list, note all Packet Data connection attempts.
Use applications at will on day two, shutting down/going offline with those you do not require. If the battery gets flat, charge it, continue to use apps/browsers if you can/need.
At commencement of sleep (second night), select go offline for Nokia Email (S60v3: Nokia Email {main menu}/Options/Go Offline), exit all others apps. In the morning, check and note Log parameters.
Repeat steps 4, 5 & 6 with varying Network mode (step 2). In all cases, phone should stay in a non-offline state - people should be able to reach you via phone call or sms at all times.
Make sure you clear browser cache every night prior to bedtime. You should check Browser (Menu/Web/Options/Clear Privacy Data/Clear Cache). Further, remove or disconnect battery to completely freshen the system.
Finally, delete Whatsapp, and repeat step number 4.
Observation:
The results for steps 1 to 8, inclusive, are essentially similar, in that access points (S60v3: Menu/Tools/Settings/Connection/Access Points & Menu/Tools/Sett. wizard, alternatively use your service provider to define access points) are activated throughout the sleep period, as follows (13 July 2011):
Internet .Vodacom(01): 00:38; 00:46; 00:54; 01:03, etc.
Internet.GPRS: 00:37; 00:41; 00:45; 00:49; 00:52; 00:57: 01:00 , etc.
Internet.GPRS(Joiku): 00:38; 00:46; 00:54; 01:02 , etc.
Vlive!: 00:39; 00:47; 00:55 , etc.
WAP.Vodacom: 00:39; 00:48; 00:53; 00:56 , etc.
Vlive!Streaming: 00:41; 00:48; 00:56 , etc.
Vlive!MMS: 00:43; 00:51; 00:58 , etc.
Internet.Vodacom: 00:37; 00:42; 00:45; 00:50; 00:58; 01:01 , etc.
BS_Gravity App: 00:41; 00:49; 00:57 , etc.
BS_Browser: 00:42; 00:50; 00:58 , etc.
Basically, an app is active throughout the the night. All data connections are outwards, last 5 or 8 seconds, a few last 34 seconds, most receive/transmit zero data, a few receive 1 kB. The final connection was an outward 12 minute 55 second at 05:08 using the Internet.Vodacom access point, sent 65 kB & received 360 kB.
Upon deletion of Whatsapp, no data connection attempt is made throughout the sleep period.
Conclusion: There is no way of turning off completely Whatsapp. Further, general phone use throughout the day disguises minute-by-minute data connection attempts by Whatsapp. This is wholly unacceptable app development in light of limited battery development for all smartphone platforms. All other apps installed on these devices have kill switches if you do not wish to continue use. All other apps, including the pricy Gravity, operate within the limits of the battery technology available and within the capabilities of the Symbian system. I do not think the trade off - all-encompassing IM service over sms sacrificing battery life is fair.
Facts:
BS_Gravity App & BS_Browser are access points defined in the Birdstep SmartConnect Client for Nokia ESeries phones. It's a client that aggregates normal network operator access points as well as Wi-Fi access points so that you do not have to continuously change access points on apps. BS_Gravity App for Gravity and all other social IM apps, BS_Browser for Web browser and Opera browsers.
Following deletion of Whatsapp, my E90 is back to around 4 hours battery duration under heavy use, primarily a very active Gravity & Web browser, up from about an hour with Whatsapp.
I am extremely content with general day to use of my Nokia phones, E90 & N8 alike. The E90 continues great operation, what I'd expect, the N8 covers base primarily browser capability - all other strengths complimentary.
Joikuspot is a considerable power user for extended use, but this is understandable, as the app gathers and transmits data which requires lots of power - basically, it's like having a 3G connection going boths ways. I'd imagine that any similar app on any competing platform saps power.
Recommendation: Install an on/off switch on the Whatsapp application. Please. Thank you.
Symbian connected me to the world, to my dreams.. Thank-you Nokia

I found unacceptable issues with the software, namely very high battery use. Many consumers will come to Nokia first before they complain to a developer - if indeed they ever do complain there. Use of the app in question paints Nokia batteries in a much harsher light than reality - people should be aware of this before they install the software.
There's a software issue here (developer x), and a software solution (developer y). The following link explains how to use y to defend from the excesses of x: http://softvision.posterous.com/39438314
Symbian connected me to the world, to my dreams.. Thank-you Nokia

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Matt_G wrote:
Thanks for replying,
Were you a heavy user of your 9810 (i.e. leaving the phone signed into Facebook, twitter, etc... and heavy use of BBM)?
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MrSpike wrote:
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I read this and felt a funny coming on....
I know its not funny when an appliance that we depend on doesn't work right, but my funny bone said, "Did you shake the phone to reset the GPS, and did you fly backwards from Mexico to reset everything as it was before you left?"
Forgive me!!!!
Message was edited by: De Gomment

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