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
lenovo x230 battery | Newegg.com
lenovo x230 battery | Newegg.com
Just Got slim battery for my x230 : r/thinkpad
Thinkpad Battery 44++ (9 Cell) | Lenovo US
X230 6-cell battery re-celling considerations, 30+ and 44+ battery info [includes pictures] - Thinkpads Forum