Lenovo ThinkPad bumps bring X201, X201s, X201t, W701, and W701ds into the Core i7 fold | Engadget
Amazon.com: Lenovo 6 Cell Battery 47+ ( 43R9254 ) For Models X200, X200S, X201i , X201 And X201s Battery, Not Used In X200 Tablet Or X201 Tablet : Electronics
Lenovo ThinkPad x200 x201 x201i Battery
Lenovo ThinkPad X201 Review | Laptop Mag
China Replacement Li-ion Battery for IBM X200 11.1V 5200mAh 6cells Laptop Battery Pack - China Laptop Battery, Laptop Replacement Battery