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") -- though it does seem to power the device as to not drain what's left of the battery while connected. In order to remedy said quandary, the folks at Sanho have announced a new line of HyperMac batteries that support iPad charging, but unfortunately for you existing users, every available upgrade path involves shelling out more cash for a new pack. The revamped devices will be available in four different capacities: 60Wh ($169), 100Wh ($269), 150Wh ($369) and 222Wh ($469), able to extend the iPad 25Wh rated internal battery by 2 to 9 times, giving a total run-time of between 34 to 99 hours. Sanho claims these will be rechargeable up to 1,000 times and will include a one-year warranty, so if you're interested, you can place your pre-order now and await a shipment notification in around a fortnight.