At this point you know pretty much all there is to know about the amazingly thin (0.6-inches), light (just 1.4 pounds or 2.2 pounds with extended battery wedge), and expensive ($1,299 base) VAIO X ultra-portable laptop from Sony. The only thing missing were tests to confirm or deny Sony's claim that the VAIO X battery lasts "all day and well into the night and will set the new standard for battery stamina," as proclaimed at its IFA unveil back in September in Berlin. A bold claim that Laptop Magazine has now put to the test. The result? Well, first of all, if you're hoping to get anything close to the hype then you'll have to opt for the extended battery -- the standard 4-cell battery is only rated fo
