iPad power adapter vs. iPhone's adpater?

Discussion in 'iPad' started by DotCom2, Apr 2, 2010.

  1. DotCom2 macrumors 68030

    Joined:
    Feb 22, 2009
    #1
    Can anyone tell me if the power adapter that comes with the iPhone can also be used on the iPad and visa versa?
    Sorry to be a n00b, I just don't know what the diff would be.:confused:
     
  2. miles01110 macrumors Core

    miles01110

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    Jul 24, 2006
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    The Ivory Tower (I'm not coming down)
    #2
    Yes you can; the iPad will just take longer to charge using the iPhone adapter.
     
  3. DotCom2 thread starter macrumors 68030

    Joined:
    Feb 22, 2009
    #3
    OIC, and why would that be?
    Thanks
     
  4. miles01110 macrumors Core

    miles01110

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    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #4
    The iPad uses a 10W adapter, the iPhone charges via USB which is 2.5W (or something).
     
  5. DotCom2 thread starter macrumors 68030

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    Feb 22, 2009
    #5
    OK thanks for the info!
     
  6. Mark Booth macrumors 65816

    Mark Booth

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    Jan 16, 2008
    #6
    The iPad charges via USB too!

    USB is 5 volts, regardless if you comes from your computer's USB port or if it comes from a USB charging brick/block. However, the amount of current each can supply varies.

    How much current your computer's USB port can supply is partially determined by how many other USB devices are plugged into it. Generally, the most you can get out of it is 500 milliamps (.5 amp). But that CAN be reduced if you have a lot of power hungry USB devices.

    The iPhone's USB charging brick is rated at 1 amp. Depending on the load, that CAN still deliver 10 watts (the rating given for the iPad charging brick). So, it is entirely possible the iPad's charging brick will be identical.

    However, I suspect the iPad's USB charging brick will be rated at 1.5-2 amps. We'll know soon.

    Regardless of rating, I suspect the iPhone USB charging brick and the iPad USB charging brick will charge the iPad in roughly the same amount of time. At the very least, both will be significantly faster than your computer's USB port.

    Mark
     
  7. MobileJoel macrumors newbie

    Joined:
    Apr 4, 2010
    #7
    ipad/iphone adapters

    I've tried all three adapters below. All three adapters work on my iPhone and iPad.
    • adapter that came with iPod 5 Volts, 1 Amp
    • adapter that came with iPhone (small cube) 5 Volts, 1 Amp
    • adapter that came iwth iPad 5 Volts, 2.1 Amp
     
  8. poe8 macrumors member

    Joined:
    Apr 3, 2010
    #8
    Yes, but charging via USB or iPhone adapter will be considerably slower than with the iPad included charger.
     
  9. matthijst macrumors regular

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    Jun 8, 2009
    #9
    So does the iPhone charge 2.1x as fast if you use the iPad charger to charge it?
     
  10. CJS7070 macrumors 6502a

    CJS7070

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    Dec 10, 2008
    Location:
    Chicago, IL
    #10
    No, you won't see a difference on the iPhone.
     
  11. Mark Booth macrumors 65816

    Mark Booth

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    Jan 16, 2008
    #11
    The current ratings on the USB Power Bricks is their maximum output rating. But that doesn't mean that's how much they put out all the time. The device that's being recharged is what determines how much current is being used.

    An iPhone is designed to draw less than 1 amp at 5 volts. The iPad, obviously, is designed to regularly want to draw MORE than 1 amp at 5 volts. However, it's also designed to just get along with less current if that is all the power brick can supply. It HAS to be designed this way because a computer's USB port can only put out .5 amp max.

    Owners of both the iPhone and iPad should pack the iPad's power brick when they travel. You can use it to recharge both the iPhone and the iPad.

    Mark
     
  12. dulaney22 macrumors regular

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    Sep 9, 2008
    #12
    Used my car phone charge yesterday. Works just fine.
     
  13. northernbaldy macrumors 6502a

    northernbaldy

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    Jan 13, 2010
    Location:
    the north, UK
    #13
    looking at it the other way

    if i mix up the adaptors, will it blow my iPhone to pieces?
     
  14. LadyHoneyBabe macrumors 6502

    Joined:
    Mar 22, 2010
    #14
    LOL!

    I'm interested in the answer too, because the Apple guy said not to use the iPad power brick for iPhone or iPod Touch and vice versa. Maybe he was just trying to sell me more accessories.

    :apple:
     
  15. fishmoose macrumors 68000

    Joined:
    Jul 1, 2008
    Location:
    Sweden
    #15
    I have a sort of related question, I'm thinking about getting one int the States when I'm there on vacation, how is the adapter built? Can you change the plug to an european one? You can take apart the iPhone adapter and change the plug .
     
  16. Mark Booth macrumors 65816

    Mark Booth

    Joined:
    Jan 16, 2008
    #16
    No.. No... No... No... and NO! :rolleyes:

    As I said, the device being charged is the device that decides how much current is being drawn. The iPad's charging brick doesn't automatically put out 2.1 amps in every situation. It CAN put out that much current IF the device is attempting to draw that much current. The iPhone is designed to draw no more than 1 amp (which is evidenced by the 1 amp charging brick). But even that is overhead! More likely, the iPhone draws less than 500mA (.5 amp). It will charge just fine with the iPad's charging brick.

    Mark
     
  17. Mark Booth macrumors 65816

    Mark Booth

    Joined:
    Jan 16, 2008
    #17
    Yes, the iPad power brick has the removable plug like the iPhone's adapter. When you purchase the iPad's adapter as an accessory, it also comes with a 6-foot A/C cord to extend the distance you can be from a wall outlet:

    http://store.apple.com/us/product/MC359LL/A

    On that very same page, near the bottom (under "Overview") it says:

    "It also charges iPhone and all iPod models with a dock connector."

    Mark
     
  18. fishmoose macrumors 68000

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    Jul 1, 2008
    Location:
    Sweden
    #18
    Thanks! So if I understand this right, you can just replace the cable with an regular cord say for the MacBooks?
     
  19. TwoBytes macrumors 68020

    TwoBytes

    Joined:
    Jun 2, 2008
    #19
    This is the only thread I could fine that is realated. Does anyone know where I can get a UK plug? I'd like an offical one to replace the US 2 pin. Any part. Numbers? Thanks!
     
  20. ctt1wbw macrumors 68000

    ctt1wbw

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    Jan 17, 2008
    Location:
    Seaford VA
    #20
    Don't cross the streams!
     

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