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
SG online offer 42T4967 Genuine Slice Battery For Lenovo ThinkPad X220T X220 X220i X220s Tablet Black
The Slice Battery for ThinkPads (🍕🔋 🍀 🤔🗒️) - YouTube
Lenovo ThinkPad X220 review | Engadget
Re-Celling an Extended Slice Battery - Thinkpads Forum
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