Lenovo has unveiled the latest update to its ThinkPad line, the T400s, promising a full notebook experience for business users in an ultra-slim chassis. This 14-inch laptop measures 0.83in at its thinnest point, and is 20 percent lighter than its T400 predecessor at just under 4 pounds; largely because of its LED-backlit display and use of the carbon-fiber roll cage design that Lenovo first implemented in its X300.

Available with a starting price of $1,599, the T400s comes with an Intel Core 2 Duo 2.4 GHz processor, 120GB hard drive, 2GB of RAM, an integrated Intel GMA 4500 graphics chip, DVD burner, 2-megapixel Webcam, and Windows Vista Business. Battery life is rated at approximately 5.5 hours, when upgraded with a solid state drive, but as always you should take that with a grain of salt. Besides the typical connectivity features, which include optional 3G and WiMAX modules, the new ThinkPad can be configured with up to 8GB of RAM, a 2.53GHz Core 2 Duo and a 2GB Turbo Memory cache to supposedly speed up load times.

The system is available now through the company’s website. Also today, Lenovo is releasing three new add-ons for its T400s: the ThinkPad Port Replicator Series 3, Mini-Dock Series 3, and Mini Dock Plus 3.