In recent years, the major players in the laptop arena (Sony, Toshiba, HP, IBM, etc,) started to produce more and more portable laptop computer, weighing less than 2.8 and thus offers much as 9 hours of playback. Often portability would come at the expense of losing functionality in favor of a smaller footprint and longer battery life.

Thanks to advancements such as new low-voltage processors from Intel, and some ingenious engineering, in most cases this is notlonger the case (although) there are some notable exceptions. You can now an ultraportable laptop computer running at a weight of slightly more than 3 kg (or less), and reserves with tremendous functionality to Windows Vista, and perhaps more importantly, keep extra long battery life - as long 9h in some cases.