Lenovo ThinkPad 44++ battery for X230 X230i (9 cell) 7800 mAh
New Genuine Laptop Battery For Lenovo Thinkpad X220 X220i X220t X230 X230i X230t Tablet Series 11.1v 5600mah - Laptop Batteries - AliExpress
Best 6 Cell Thinkpad Lenovo 45N1079 | Refurbished
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 0A36282 Thinkpad Battery 29+ (6 cell) for X220 Series - Newegg.com