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 Battery - Laptop Batteries
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Lenovo ThinkPad X60 X61 Battery
TravisLappy Compatible Battery for IBM Lenovo Thinkpad X60 X60S X61 X61S Series 4 Cell : Amazon.in: Computers & Accessories
42T5209 IBM Lenovo 8-Cell 14.4V 4550mAh Li-Ion Battery 64 for ThinkPad X60 X61 Tablet Series (Refurbished)
Lenovo ThinkPad X60 X60t X61 X61t Extended Run Battery