Rugged enough to pass eight military-specification tests, but light enough to go with you anywhere. The Lenovo T420s laptop is your trusted business partner. The T420s delivers advanced videoconferencing and file transfer features, along with longer battery life and uncompromising performance at breakneck speeds. The T420s offers up to 5.5 hours of battery life when operating basic applications. You can even squeeze out a little extra battery life in extreme circumstances using the Battery Stretch feature of Lenovo's Power Manager utility.