 Most notorious is the inclusion of a MiniPCI slot on the bottom, the presence of a slightly faster processor, and the color of the case (silver lid was maintained, the rest of the case is all-black).Firsts units of this model originally came with a Ni-MH battery pack, while later ones came with a more dependable Li-Ion one.Both types were available for purchase, and obviously they fitted in all of the 1200-series.