As the new owner of an iPad, it was disappointing, but not surprising, to see a "not charging" in the upper right hand corner of my iPad when I connected it via USB to my Apple Keyboard from 2007. However, connecting it directly to my MacBook Pro from 2010 does charge the iPad, so it seems it's just a simple matter of my USB keyboard not drawing enough power.
Is this something that Apple has updated/changed about their USB keyboard since I bought mine in 2007? The products are otherwise identical. If not Apple, are there any third parties that have keyboards that will supply the necessary power to charge an iPad?
Best Answer
Yes, but only with the iPad in sleep mode.
The iPad requires at least 500mA from a USB port:
About wired keyboard we get the information:
[source 1 from support.apple.com]
As the wired keyboards can provide the minimum 500mA required by the iPad (just like older Macs can), it should be possible for it to power the iPad. However, it can not provide an additional current which would allow for faster charging.
But, the new iPad can only charge in sleep mode when connected to a low powered USB hub:
[source 2 from support.apple.com]