New Genuine Laptop Battery For Lenovo Thinkpad X220 X220i X220t X230 X230i X230t Tablet Series 11.1v 5600mah - Laptop Batteries - AliExpress
Building An Open Source ThinkPad Battery | Hackaday
ThinkPad slice battery for X220 / X230 - YouTube
Just bought a quirky x220 slice battery. Looks exactly like a 19+, but says 20+. Works completely fine with 1% wear. Does anyone know what it might be? : r/thinkpad