Amazon.com: E ERSY 45N1700 Battery Fit for Lenovo ThinkPad New X1 Carbon 20A7A04ACD 14-Inch, ThinkPad X1 Carbon Gen 3, 45N1701 (15.2V 51Wh) : Electronics
Lenovo ThinkPad X1 Carbon 20HRCTO1WW LLN349 4800mAh / 55Wh Notebook Battery - BattDepot United States