Lenovo ThinkPad X220 really does get 20+ hours of battery life (sort of) - Liliputing
NEW 9 CELLS LAPTOP BATTERY FOR LENOVO ThinkPad X220 X230 X230i Tablet X220T X230T Series 0A36285 42T4878 42T4879 42T4881|battery l1154|battery doublebattery pendant - AliExpress
CWK Long Life Replacement Laptop Notebook Battery for IBM Lenovo ThinkPad 52+ 0a36317 67+ the x220 t tablet and x230t tablet 42t4877 42t4878 42t4879 42t4880 42t4881 42t4882 52+ - Walmart.com
Green Cell Battery for Lenovo ThinkPad X220 X220i X220s / 11,1V 4400mAh - GreenCell - PowerX - Battery specialty store