Microsoft will officially launch the Surface Pro -- the larger, more powerful version of its Surface tablet -- on Feb. 9. The reviews are already in, though, and if there's one consistent knock against the device it's battery life, which lasts only a few hours. However, Microsoft's engineering team has revealed that external batteries may be in the works. The Surface engineering team hosted an AMA (ask me anything) about the Surface Pro on Reddit Wednesday afternoon, and one redditor asked if any kind of keyboard accessory with a built-in battery -- which is the norm for other companies' ... Read More