The USNA95 is billed as "the world's smallest 95W adapter" for charging notebook computers. It's certainly got the portability part down, being comparable in dimensions to two notebook hard drives stacked atop one another. Check out our review of this notebook peripheral to see if the convenience of a trimmer notebook power adapter (with a built-in USB 2.0 port to power USB devices) warrants its ~$60 price tag.