The Logitech Solar Keyboard Folio is a case for Apple's iPad 2 and new iPad that comes with an integrated Bluetooth portable keyboard, and it's unique because it has a rechargeable battery that's powered up via ambient light. When fully charged, Logitech claims the Solar Keyboard Folio can\u00a0deliver two hours of daily usage for two years\u2013even if it is\u00a0used in complete darkness.\n\t\n\tI did a side-by-side comparison with the Logitech Ultrathin Keyboard Cover I reviewed\u00a0in April, and I found the sizes and key placement\u00a0to be the same. As such, users can expect the same superb usability\u00a0that impressed me when I\u00a0reviewed\u00a0the Ultrathin Keyboard Cover. The Solar Keyboard Folio also has some additional media shortcut keys along the bottom row that\u00a0work along with a\u00a0Function key.\u00a0And the shortcuts are\u00a0valuable when the Folio is used in entertainment mode\u2013more on that later.\n\tThe Logitech Solar Keyboard Folio deployed in "entertainment mode"\n\tEmbedded magnets in the Folio switch your iPad off automatically.\n\tThe cylinder in the center houses a couple of NiMH rechargeable batteries. They are not user-replaceable.\n\tPairing the keyboard is simple thanks to a dedicated Bluetooth connect button located along the edge of the keyboard.\u00a0A\u00a0power-check button beside the Bluetooth key triggers a status light\u00a0that\u00a0flashes green when he Solar Keyboard Folio is charged and\u00a0red\u00a0when the charge\u00a0drops down to 20 percent or lower.\n\tA magnet switches your iPad off when the folio is closed and\u00a0turns it back on when the case is flipped open. The Solar Keyboard\u00a0Folio notably has no power button. While the Bluetooth radio automatically powers off when the Folio is closed, this could be a problem for frequent air travelers who have no way of disabling the keyboard to use their iPad when in the air.\n\tThe Solar Keyboard Folio offers excellent protection for an iPad tablet.\u00a0A band fits on easily and extends all the way around the iPad.\u00a0The case should\u00a0adequately protect your tablet\u00a0from the inevitable hard knocks when on the road or even the occasional fall. And the Solar Keyboard Folio\u00a0is designed to be used in\u00a0two angles: a typing angle that's\u00a0great for typing on the keyboard; and\u00a0an entertainment\u00a0angle that is ideal for watching a movie.\n\tA close-up of the single row of keys that's exposed in entertainment mode.\u00a0Note the various multimedia controls.\n\tNote the solar cell on the right of the photo above.\n\tThe design of the Logitech Solar Keyboard Folio is well thought out. Note the\u00a0holes for the iPad audio.\n\tLogitech Solar Keyboard Folio: Room for Improvement\n\tI can't help but question the\u00a0durability of the case's solar cell. The clear plastic surface does not appear to be scratch resistant, and\u00a0shallow scratches appeared shortly after I peeled off the protective adhesive sheet and started using the case.\u00a0It doesn't\u00a0help that the solar cells face down when the keyboard is\u00a0in use. I don\u2019t expect the scratches to significantly degrade the power capture capabilities of the solar cells, but they'll probably start to look unsightly after a few weeks of use. (Update: According to Logitech, the solar cells are protected by a\u00a0transparent Mylar window)\n\tIn my experience the Solar Keyboard Folio's recharging mechanism worked as advertised, though it would have been nice to be able to access additional details\u00a0on the battery's\u00a0charge level.\u00a0\u00a0The Logitech Solar Keyboard Folio uses NiMH batteries,\u00a0and the manufacturer suggests\u00a0you keep the cells facing upward when it's not in use, to help ensure it remains charged.\n\tFinally, it would\u00a0have been\u00a0great if the Folio was held shut by magnets, which isn\u2019t the case currently.\n\tLogitech Solar Keyboard Folio Review: Conclusion\n\tLogitech's Solar Keyboard Folio\u00a0converts\u00a0your iPad into a mobile workstation capable of handling intensive data entry when on-the-go. One inevitable downside of integrating a keyboard into a case is that it will be significantly more bulky than your typical keyboard-less\u00a0case. (Check out my\u00a0five\u00a0favorite iPad\u00a0cases.)\n\tFor folks who perform extensive data entry and who want a "physical" keyboard however, the Logitech Solar Keyboard Folio is a well-conceptualized and well-designed option. It doesn't come cheap,\u00a0though; Logitech is selling the Solar Keyboard Folio\u00a0for $129.99.\u00a0\n\tNote the Bluetooth Connect button and the Battery check button.