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  1. #1
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    Sudden iPhone battery drain?

    Overnight, my iPhone has been dropping about 30% of battery.

    As well, battery also seems to be getting chewed up much faster during the day, when I use my iPhone, compared to normal. For example, I'd lose 1-2% of battery for every second of normal usage, for example, using WhatsApp or internet surfing. This is about double the amount I used to lose.

    When I play iTunes songs for about 1 hour, I'd lose about 25% of battery these days. I used to lose only 10% when I did this.

    This has been the case for the past two days.

    Previously, it used to drop only about 5% every night.

    However, I don't remember installing any new apps, themes or tweaks recently, so what could the reason for this sudden battery drain be? Any suggestions? I also haven't changed or adjusted my iPhone's settings since then i.e. screen brightness, etc.

    I have an iPhone 4 (5.0.1), jailbroken.
    Last edited by iniesta; 05-18-2012 at 08:55 PM.



  2. #2
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    Restart the phone by pressing and holding the top button then the home button until the phone restarts. Then charge it to 100% and let it drain til it dies and charge to 100% again. When charging, don't take the phone off the charger.


    Sent from my iPhone using Tapatalk

  3. #3
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    Thanks for your response... my phone's dropping less than 10% overnight now...

  4. #4
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    sudden iphone 4 battery drain

    Quote Originally Posted by Chris951 View Post
    Restart the phone by pressing and holding the top button then the home button until the phone restarts. Then charge it to 100% and let it drain til it dies and charge to 100% again. When charging, don't take the phone off the charger.


    Sent from my iPhone using Tapatalk
    i just had the weirdest thing happen to me today. i've had my iphone 4 for exactly 2 years now. i left it last night with 80% battery, slept for 8 hours, woke up to find it at 35%. wifi was off, no programs were running except for: calendar, messages, settings, skype. there were no notifications at all.

    my normal battery drain during night time is between 5% and 7%. i have never had a 50% drop! but i usually don't leave skype running. the phone is running the latest ios (which i think is 6.1)
    this happened to me once only on ios 5, but i had left teh phone for 6 hours in a poor reception area. however laast night it was at home, which is notmally a good reception area.

    my question is: could this have been skype running, or is it possible that i had lost signal at some point and the phone was searching all night? and if so, should this drain 50%?

    is there a solution or a way of finding out what's wrong?

  5. #5
    Senior Member
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    Sudden iPhone battery drain?

    I read way before, that, skype left in multitasking is battery killer.


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