An iPhone charges just fine when plugged into a computers USB port. The same goes for an iPod, a pocket camcorder, and any of countless other devices. So whats the iPads problem?
Actually, the difficulty isnt with the iPad, but with the USB port: Its not supplying enough juice. The ports built into most desktops, laptops, and even powered USB hubs dont generate the 10 watts necessary to charge an iPads battery, which is why the ‘Not Charging message appears over the battery indicator. Thats a definite bummer, as it means you cant use, say, your laptop to recharge your iPad on the road. In fact, Apple recommends finding an AC outlet and using the bundled 10-watt power adapter.
That said, lower-powered USB ports will recharge an iPad--just very, very slowly. When the tablets screen is off, the battery does indeed draw a trickle of power. Turn the iPad back on, however, and youll see ‘Not Charging again. (Its kind of like yanking open the refrigerator door to see if the light is still on.)
You should be aware that many PCs pump varying wattages through different USB ports. Frequently the USB ports at the front of the PC are of lower power than the ones in the back. Before giving up, try moving to another port.
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