New Genuine 67+ Battery for Lenovo ThinkPad X220t X230t tablet 0A36317 45N1075 | eBay
X230 6-cell battery re-celling considerations, 30+ and 44+ battery info [includes pictures] - Thinkpads Forum
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 ThinkPad Battery 67 - Notebook battery - 1 x lithium ion 3-cell 29 Wh - for ThinkPad X220 Tablet; X220i Tablet; X230 Tablet; X230i Tablet (0A36316) at TigerDirect.com