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
facelessloser on Twitter: "Not surprising but adding a 9 cell battery to my thinkpad x220 made it quite a bit heavier. Hope its better battery life then my old aging battery #ThinkPadX220 #