If you have a mobile staff that's always on the move, the ultraportable IBM ThinkPad X31 notebook with Intel Centrino Mobile Technology (select models) is indispensable. Other ThinkPad X31 models offer the wireless flexibility and backward-compatibility of integrated 802.11a/b/g technology. The optional ThinkPad X3 UltraBase adds even more functionality. Work on and on and on - up to 10.1 hours unplugged - when you combine the standard battery with the optional Extended Life Battery. This unique battery fits on the bottom of the ThinkPad X31 notebook and even improves the ergonomic typing angle while providing power. Best of all, it weighs less than a pound. Look inside and discover IBM ThinkVantage Technologies and ThinkVantage Designs to help free up IT resources and decrease expenses. You'll see how to work more confidently and efficiently - and gain the time you need to focus on strategic goals.