The HDD capacity allows great freedom of action, self-lit keyboard can work even with low brightness, the monitor provides a significant 13 per readability both Internet only for work on desktop software. Prob: -8 under windows much less free app on my Android tablet. Battery capacity prob: capicité maxilmale 4 hours; when looking at the batteries, that of the tablet ok but the second (of the keyboard) is marked absent! Normal?