Best Buy: AGPtek New 6 Cell IBM Lenovo Thinkpad X60 X60S X61 X61S Battery Replacement Li13A
IBM / Lenovo 42T5209 - 14.4V 8-Cell Lithium-Ion Replacement Battery for Lenovo Thinkpad X60 Tablet, X61 Tablet - CPU Medics
4Cell Battery for Lenovo IBM ThinkPad X60 X60s X61 X61s 92P1168 92P1174 40Y7003 | eBay
Amazon.com: Original Lenovo ThinkPad X60, X61, X60S, X61S Series Laptop battery 22++ (8 Cell, High Capacity 5200mAh/75W, 14.4V) 40Y7003 w/ one replacement Spacer & screws[NOT compatible with the X60 X61 Tablet PC
IBM ThinkPad X61 LIB201X 4400mAh / 63Wh Notebook Battery - BattDepot United States