That is not a laptop at all, and the price is way too high.
It is what is known as a "desknote," a notebook-shaped desktop computer. Like you said, it has an "external battery." Repeat: it is not actually made to be used as a laptop, but a desktop.
EDIT: it uses a desktop processor, desktop chipset, desktop vga chip, no power saving at all. The battery space is taken up by all the extra cooling needed in there. With the external battery, the life is barely an hour, if even that (if I remember correctly).
And older review:
http://www.anandtech.com/mobile/showdoc.html?i=1628
Sam