We're pretty big fans of the HyperMac external batteries here at Engadget, as they've saved us on numerous occasions from becoming mindlessly bored on coast-to-coast flights by keeping our laptops humming for a few more hours. Unfortunately, the integrated USB port -- while handy -- isn't up for handling Apple's new iPad, which requires a 10 watt USB adapter to even charge. We tested our lab iPad on our existing 222Wh HyperMac, and sure enough, the screen you're peering at above is what we saw (read: "Not Charging")
