Green Cell Battery for Lenovo ThinkPad X220 X220i X220s / 11.1V 6600mAh
Amazon.com: Lenovo ThinkPad 9 Cell Lithium Ion Battery 44++ ( Manufacturers P/N; 0A36307 ) 94Wh Extended Life System Battery For X220 And X230 Laptops Only : Electronics
Green Cell Battery for Lenovo ThinkPad X220 X220i X220s / 11.1V 6600mAh
Dr. Battery Advanced Pro Series Lenovo ThinkPad X220 Series LLN224-AP 5200mAh / 57Wh Notebook Battery - BattDepot United States