Battery for Dell Studio XPS 16 1640 1645 1647 312-0814 U011C W298C X413C W267C
Dell XPS 17 Review: A Mobile Workstation in Disguise | Digital Trends
Amazon.com: DR. BATTERY U011C 312-0814 X411C W303C X413C 312-0815 R720C Battery Replacement for Dell Studio XPS 16 Studio XPS 1640 Studio XPS 1647 Studio XPS 1645 Studio XPS M1640[11.1V/4400mAh/49Wh] : Electronics