I am considering getting the surface pro 2 (256g version). I use a desktop at work, but I plan to also use the surface on a daily basis for taking into meetings for notes (mainly typing , but the digitzer might be handy sometimes), and docking it at home as a computer in the evenings. My main concern, and the reason I am hesitating before purchasing, is if daily use of this type might quickly degrade the battery. I don't want to find within less than a year that the battery no longer lasts, and that I'm stuck with a need for an expensive replacement. I'm wondering whether I'd be better off going for a dell venue pro 11 which has a replacabale battery (or the xps 11). I must say that I prefer the specs of the surface pro 2, but don't want to end up needing to replace it in a year because of baterry life. Am I right to be worried?