The Surface Team did a Q&A today on reddit where prospective users could ask them questions regarding the Surface pro. I read most of them but the response that, I was interested was this one: [–]irishchug 4 points 57 minutes ago Does Microsoft have any plans for an external battery or for a thicker keyboard cover that has an extra battery? Or, if I want an external battery brick, is there a third party one I can buy that can be used with the surface. [–]SurfaceTeam 7 points 6 minutes ago That would require extending the design of the accessory spine to include some way to transfer higher current between the peripheral and the main battery. Which we did... I know its vague but gives me hope that we might see some sort of Microsoft or aftermarket keyboard that will provide additional battery life in the future.