The ThinkPad W520 4276-37U 15.6" Laptop Computer from Lenovo is a highly portable, high-performance computer that means business. This notebook computer features a widescreen 15.6" viewable display with a 16:9 aspect ratio and a Full High Definition (FHD) resolution of 1920 x 1080. The display also has an antiglare screen. The system features a comfortable, spill-resistant keyboard and Lenovo's UltraNav system for mousing. UltraNav combines a TrackPoint and a large multi-gesture TouchPad for precise cursor control. The included 9-cell battery can power the system for up to 10.8 hours. Plus, if you opt to purchase Lenovo's "slice" battery, the system can run for up to 21.6 hours before needing a recharge.