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usb power specs on the airport express (802.11n v1)

1915 Views 4 Replies Latest reply: Jan 29, 2013 2:59 AM by robogobo RSS
sob8 Calculating status...
Currently Being Moderated
Jul 22, 2012 4:28 AM

I can't seem to find any info on the specs of the usb port on the airport express (802.11n v1).  I was wondering about the output voltage and amperage.  I plugged in my 2nd generation iPod Touch to the usb port and it started charging just fine.  I would still like to know the exact values.  Thanks.

Airport Express
  • Bob Timmons Level 9 Level 9 (75,425 points)
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    Jul 22, 2012 8:48 AM (in response to sob8)

    The key is that you note that "it started charging.....".  But, it very likely stopped charging within a minute or two.

     

    Apple does not publish a specification for the USB port, but maybe another user has tested to see what this might be. Good luck on that.

     

    Whatever the actual output voltage might be at the USB port on the Express, it is not enough to charge the iPhone or iPad.

  • Bob Timmons Level 9 Level 9 (75,425 points)
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    Jul 23, 2012 5:19 AM (in response to sob8)

    I don't know if the "new" Express actually has any more output....I doubt that it does....but I do know that the 2 samples that I have of the product will not charge the iPhone or iPad.

     

    I have not tried using a powered USB hub as a charger. You might want to give that a try if it is important for you to be able to charge a mobile device from an AirPort.

  • robogobo Level 2 Level 2 (290 points)
    Currently Being Moderated
    Jan 29, 2013 2:59 AM (in response to sob8)

    The first and second generation Airport Express had a higher USB power output.  I used to charge my iPhone 2g off of it, as well as run USB powered speakers off of it (which was nice because it only required one power outlet to stream music - the first Airplay speakers!). But later generations lowered the spec, and trying to power speakers would cause clipping if you turned the volume up too high.

     

    Unfortunately all the old ones had PSU problems, so it's very hard to find them around anymore.  Probably the lower USB output was necessary to fix that problem. I frankensteined a couple of mine to keep them going for a while, but I just lost my last one a few weeks ago.

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