jpetreman
Level 1 (0 points)

Q: Possible iPhone 4s battery fix?

I wanted to contribute this to the community as a possible fix for people who own an iPhone 4s and have experienced rapid battery drain after one of the recent iOS updates. The fix seems to have worked for me. 

 

I had searched everywhere on these boards but found no solutions - my 4s, which had always worked fine, was suddenly draining in 4 hours with little or no usage.   Then I noticed that my MacBook pro one night had its fans on quite loudly while I was not really using it. I checked the running processes and found that Safari was using a lot of CPU time.  Looking into it further and searching the web for others with this problem, I discovered that it was my Reading List in safari which was using a ton of CPU.  

 

I had noticed before that I use Reading List in a somewhat unconventional way - I drag a lot of pages in there, using it as a sort of "bookmark list" for interesting pages.  It took me a while to realize that the OS caches those pages for offline viewing and keeps them updated.  It seems certain pages were choking this system for some reason, using a lot of CPU and memory. 

 

After i noticed noticed this, I completely cleaned off my phone (again), reset all settings, then removed everything from my Reading List.   Amazingly, this seems to have solved my battery problem.   I can imagine this won't work for everyone, but I thought I would mention it in case others use Reading List in the same way.

iPhone 4S, iOS 8.1.3

Posted on Feb 15, 2015 11:04 AM

by Ingo2711,Solvedanswer
Ingo2711 Ingo2711
Level 7 (25,977 points)
iPhone
A:

You can mark your own post as "Solved". That way  other users will come more likely across your thread.

Posted on Feb 15, 2015 11:03 PM

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jpetreman

Q: Possible iPhone 4s battery fix?

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  • Helpful answers

  • by Ingo2711,Solvedanswer

    Ingo2711 Ingo2711 Feb 15, 2015 11:03 PM in response to jpetreman
    Level 7 (25,977 points)
    iPhone
    Feb 15, 2015 11:03 PM in response to jpetreman

    You can mark your own post as "Solved". That way  other users will come more likely across your thread.

  • by Drew Reece,

    Drew Reece Drew Reece Feb 15, 2015 11:32 PM in response to jpetreman
    Level 5 (7,793 points)
    Notebooks
    Feb 15, 2015 11:32 PM in response to jpetreman

    For anyone trying to resolve issues like this the iOS 8 'battery shaming' feature may indicate the app that may be contributing to drain.

    http://m.imore.com/how-understand-battery-usage-ios

  • by jpetreman,Helpful

    jpetreman jpetreman Feb 16, 2015 2:08 AM in response to jpetreman
    Level 1 (0 points)
    Feb 16, 2015 2:08 AM in response to jpetreman

    Can't seem to mark my own post as the solution, but here it is again:

     

    I wanted to contribute this to the community as a possible fix for people who own an iPhone 4s and have experienced rapid battery drain after one of the recent iOS updates. The fix seems to have worked for me.

     

    I had searched everywhere on these boards but found no solutions - my 4s, which had always worked fine, was suddenly draining in 4 hours with little or no usage.   Then I noticed that my MacBook pro one night had its fans on quite loudly while I was not really using it. I checked the running processes and found that Safari was using a lot of CPU time.  Looking into it further and searching the web for others with this problem, I discovered that it was my Reading List in safari which was using a ton of CPU. 

     

    I had noticed before that I use Reading List in a somewhat unconventional way - I drag a lot of pages in there, using it as a sort of "bookmark list" for interesting pages.  It took me a while to realize that the OS caches those pages for offline viewing and keeps them updated.  It seems certain pages were choking this system for some reason, using a lot of CPU and memory.

     

    After i noticed noticed this, I completely cleaned off my phone (again), reset all settings, then removed everything from my Reading List.   Amazingly, this seems to have solved my battery problem.   I can imagine this won't work for everyone, but I thought I would mention it in case others use Reading List in the same way.