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iPhone 4 Gets Really Hot When On Charge

48705 Views 22 Replies Latest reply: May 12, 2011 9:33 AM by Benyoussef RSS
  • M Sebastian Calculating status...
    Currently Being Moderated
    Jul 9, 2010 4:58 PM (in response to redbusa06)
    You're not charging it right.
    iOS 4
  • Mercymelms Calculating status...
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    Jul 16, 2010 7:40 PM (in response to redbusa06)
    Mine only gets hot when wall charging and worst if plugged into extension cord. It's almost on fire and scares me. Can't be normal. I'm calling in on this. Will post again after I get an answer.
    Windows XP
  • Kwopau Level 4 Level 4 (1,725 points)
    Currently Being Moderated
    Aug 11, 2010 2:15 AM (in response to Chezza1)
    Sorry to bring this topic up and better to type here then Starting a new thread.

    Anyways, I found out that when I charge my iPhone 4 through the wall, my phone seems to get really warm and I can definitely feel the heat. My 3G S was not like this and now it worries me that something could go wrong. So do you think I should take it to the apple store and have a genius take a look at?

    Does anyone have this heat problem when they charge their iPhone?
    HP Pavilion DV2812tx, HP DV4-1504tx, Windows 7, iPod Hi-Fi, iPhone 4 32 GB Black
  • macminiwannabe Level 1 Level 1 (70 points)
    Currently Being Moderated
    Aug 11, 2010 6:03 PM (in response to Kwopau)
    Mine also gets very warm when charging. Not like so hot it burns but it feels very warm. Anyone know what a acceptable temp is when charging?
    Macbook Gen 2, Mac OS X (10.6.2)
  • Steve Sussman Level 1 Level 1 (55 points)
    Currently Being Moderated
    Aug 11, 2010 8:33 PM (in response to DarkOneX)
    DarkOneX wrote:
    Mine doesn't get hot at all when charging.

    Me neither, even when I use the iPad charger on it
    Dell Studio XPS 8100, Windows 7, x64 8GB RAM (oh and also an iPod 5G, iPhone 4 32GB, and iPad 64GB :))
  • channelasian Calculating status...
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    Sep 9, 2010 6:14 PM (in response to Chezza1)
    mine also the same. the first few days it was fine, but now seem not ok... the heat get hot while charging and after using about 5mins also the heat not normal. how to fix it?
    Lenovo, Windows XP Pro
  • andre178 Calculating status...
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    May 5, 2011 10:07 AM (in response to Chezza1)

    1. Battery discharge/charge is very inefficient, with more than 30% loss due to heat.  Also it has electrical resistance etc that causes heat to escape.

    1b. The faster the processor, the more it over heats. Read up on wiki about the size of processor vs thermal limitations.

    2. Iphone 4 is made of a glass that dissipates heat faster than the older plastic models (3g and 3gs), so it'll feel hotter.

    3. It is better that the heat escapes and cools down the main chips, so if it bothers you, then I recommend you get a case.

  • Benyoussef Calculating status...
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    May 12, 2011 9:33 AM (in response to Chezza1)

    When you google this, there is a link on apple's website that states to take it out of its case while charging. Some cases will cause this. My wife and I both have iPhone 4s and while mine doesnt get hot while charging (my phone has a bumper) hers does (her phone has a full case) Hope this helps someone.

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