Very Hot Magsafe power Adaptor

Discussion in 'MacBook Pro' started by shinerwright, Aug 1, 2012.

  1. shinerwright macrumors newbie

    Joined:
    Jun 14, 2008
    #1
    Just had a surprise.

    I was charging up the battery on MBPr. The battery was half charged and I noticed that the pilot light on the connector to the laptop was glowing orange instead of green. I disconnected it and picked up the Magsafe Power Adaptor and it was almost too hot to handle.

    Is this normal for it to get so hot? Should the light stay green until the battery is fully charged?

    Any suggestions gratefully received

    Shiner
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    Yes, it's normal for the adapter to get hot while charging. The light is amber while it's charging and turns green when it's fully charged.

    This should answer most, if not all, of your battery/charging questions:
     
  3. shinerwright thread starter macrumors newbie

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    Jun 14, 2008
  4. JSMencer macrumors regular

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    Oct 30, 2007
    #4
    my adapter got so hot it actually burnt my daughter, and left a mark. I emailed apple, and I am waiting for a response.
     
  5. BlazednSleepy macrumors 6502a

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    Apr 15, 2012
    #5

    No offense but you daughter shouldn't have been around a power adapter let alone something that can easily hurt her, like electricity.
     
  6. Weaselboy Moderator

    Weaselboy

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    California
    #6
    No offense, but you have no idea how old his daughter is.
     
  7. flipnap macrumors 6502

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    May 1, 2012
    #7
    wow. thats actually pretty serious. howd she get burned? was a red mark or a blister? did she sit on it, touch it, how long was the contact? was the plastic melted or disclored? was it plugged into an extension or against the wall? did she lean against it if so? how old is the wiring in your house? have you had any other adapters burn or get hot? did she require medical care? can you replicate the problem? buy a laser sighted thermal gun at home depot for 60 bucks and measure the temps. get a certification from the fire department and a notorized witness and you can sue apple for millions. document everything.

    any answers would help.
     
  8. BlazednSleepy macrumors 6502a

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    Apr 15, 2012
    #8
    Completely true but I assumed it's a young girl with sensitive skin that can easily burn, not some teenager.
     
  9. flipnap macrumors 6502

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    May 1, 2012
    #9
    she could be 47 years old
     
  10. Weaselboy Moderator

    Weaselboy

    Staff Member

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    #10
    ... with sensitive skin. :D
     
  11. wethackrey, Aug 7, 2012
    Last edited: Aug 7, 2012

    wethackrey macrumors 6502

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    Feb 27, 2007
    Location:
    Redondo Beach, California
    #11
    Hmmmm... first, I think you're confused about the meanings of the colors of the power LEDs on the adapter. Green indicates full charge. Orange indicates charging. From your description, it looks like your adapter is behaving correctly.

    As for heat, yes they do get hot. You're pulling up to 85 watts from the thing. Under full load it will definitely be too hot to handle comfortably. Try handling an illuminated 85 watt light bulb. This is a far cry from being dangerous or a fire hazard though.

    Frankly, it doesn't sound like you have anything to be concerned about.

    By the way... you can try this experiment. Cover the power adapter with something for a few minutes while it's under load. The internal thermal protection should shut it down fairly quickly. For heaven's sake don't cover it with anything flammable and don't cover it for long. And remember that, if the thermal protection isn't working and you're not paying close attention, it could get so hot that the magic smoke will escape. And, whatever you do, keep JSMencer's daughter away from the damned thing.
     
  12. Outkast27 macrumors 6502

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    Feb 16, 2012
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    Earf
    #12
    mine has got too hot to touch also. I noticed about the second day of using my rMBP
     
  13. T5BRICK macrumors 604

    T5BRICK

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    Aug 3, 2006
    Location:
    Oregon
    #13
    I must have crazy callouses on my hands because I've never had a time that I couldn't pick up the A/C adapter on any of the MacBook Pros I've owned.

    If your adapter is anywhere near the temperature of an illuminated light bulb, take it into a service center. It should be at most 125F, whereas a 60W bulb is usually around 260F.
     
  14. wethackrey macrumors 6502

    Joined:
    Feb 27, 2007
    Location:
    Redondo Beach, California
    #14
    I didn't intend to imply that the 85W power adapter should get as hot as an 85W light bulb... just that both convert some of that 85W to heat, and that, if this were a light bulb, you wouldn't be surprised at the temperature.

    Right now, with the MBPr fully charged and nothing connected to it, my power adapter is hot to the touch but not uncomfortable. Earlier, when it was both charging and powering an external Thunderbolt drive, it was so hot that it was uncomfortable to hold. Of course I haven't worked construction for a few decades so my hands are likely not as calloused as some. :)

    My assumption is that JSMencer's daughter doesn't work construction either, but I suppose that's probably a sexist attitude.
     
  15. Rocky244 macrumors regular

    Joined:
    Jun 14, 2012
    #15
    Depending on how old the adapter is, and its condition it may be malfunctioning.

    My 4 year old adapter started having heat issues, and eventually got so hot that the wire burnt through the casing, and when I went to disconnect it I got quite a shock. I was pretty pissed. Not to mention the burn on my fingers.

    And no, I am not that man/woman's daughter.

    ----------

    But considering that the OP didn't know chargers glow orange during use probably indicates heat temperatures are normally hot for his case.
     

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