buying my x230 a 9 cell battery so i can have a good battery life : r/ thinkpad
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
29++ 9 Cell Battery for Lenovo ThinkPad X220 X220i