iPad not charging via USB? Make sure you're using a high-power port
If your iPad isn't charging properly via USB cable, try changing the port you've got it plugged in to. Turns out iPad requires more power to charge than iPhone or iPod touch, and not all USB ports are powered equally (some are branched off, like hubs). This is especially true of laptops, including MacBooks. Could be front vs. back, left vs. right side, just keep trying until you find a high-power USB port that does the job.
(This is also why the iPad included a different, 10 watt power adapter from the one included with the iPhone and iPod touch). Apple has a knowledge base article up with a variety of other iPad charging related information, so be sure to check that out.
Hey, 10hrs of battery life on a 9.7" display don't charge cheap!
[Thanks to everyone who sent this in!]
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Rene Ritchie is one of the most respected Apple analysts in the business, reaching a combined audience of over 40 million readers a month. His YouTube channel, Vector, has over 90 thousand subscribers and 14 million views and his podcasts, including Debug, have been downloaded over 20 million times. He also regularly co-hosts MacBreak Weekly for the TWiT network and co-hosted CES Live! and Talk Mobile. Based in Montreal, Rene is a former director of product marketing, web developer, and graphic designer. He's authored several books and appeared on numerous television and radio segments to discuss Apple and the technology industry. When not working, he likes to cook, grapple, and spend time with his friends and family.