updated 04:45 pm EDT, Sat April 3, 2010
USB hubs, Windows PCs struggling with iPad power
A number of early iPad buyers have reported that the tablet isn't charging from their computers' USB ports. Even when using rear ports, some Windows PC owners have noticed their iPads refusing to charge at all. Most Mac owners haven't had issues, and all have successfully charged from the bundled AC adapter.
Apple already has a support document warning that the iPad won't charge from low-power ports, such as those on wired keyboards or some front-mounted ports on Windows computers. The iPad's much larger 9.7-inch screen and possibly other demands call for more energy than the iPhone or iPod.
Whether or not the problem is widespread or can be fixed with a firmware update isn't known given the small amount of time the iPad has been on sale. Company representatives have so far told shoppers to charge directly through USB in the interim.