Amazon.com: Lenovo 0A36307 ThinkPad 9 Cell Extended Life Battery 44++ for Lenovo ThinkPad X220, X230 Models Only. (Caution: Not for X220 Tablet, X230 Tablet Models) : Electronics
Bargain purchase, original 19+ slice battery for my ThinkPad X230, £7.50 on Ebay auction! : r/thinkpad
The Slice Battery for ThinkPads (🍕🔋 🍀 🤔🗒️) - YouTube
Lenovo ThinkPad X220 really does get 20+ hours of battery life (sort of) - Liliputing
Lenovo ThinkPad X220 Hands On, Details, Specs And Video
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