The Powerbag is a backpack, a sling, a tablet bag and a portable charging station for your mobile devices. The convertible bag is also roomy enough to carry your books, clothes and other personal items.
Inside the Powerbag is a 3000 mAh or a 6000 mAh battery that can charge four devices at once using the included micro-usb, mini-usb and Apple charging cable. The $139 Powerbag is slated to arrive in October at major retailers like Best Buy and Office Max. [Powerbag via ChipChick]