Lenovo ThinkPad X220 really does get 20+ hours of battery life (sort of) - Liliputing
Original Lenovo ThinkPad X220 X220T X230 X230T Slice battery 0C13380 0A36280 in United States|original canon batteries|battery bellbattery sealed lead acid - AliExpress
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
Lenovo ThinkPad X220 Review
New Genuine Laptop Battery For Lenovo Thinkpad X220 X220i X220t X230 X230i X230t Tablet Series 11.1v 5600mah - Laptop Batteries - AliExpress