China-based Mipow has just released Juice Book for iPad 2 ($119), probably the most unique of its recent battery case offerings. It combines the company's Power Tube 6600 battery with an authentic leather folio-style case. The battery fits inside a round opening that runs the height of the case and connects to the iPad 2 with a small cable, included in the package. Like all of the products we have seen from Mipow, Juice Book charges too slowly for…
