Lenovo part: Lenovo ThinkPad Battery 19+(6 Cell Slice - X220, X220T)

Overview:
Features and Benefits: * Supports X220 ThinkPads * Lithium-Ion (Li-Ion) technology * Six cell, rechargeable system battery, 64Wh Allows direct charge from AC adapter (65W, 90W, 135W) * No external battery charger needed * Hot pluggable * Standard system battery specifications * Over-discharge protection For more information on batteries, For more information on options, including compatibility.
| Model name | 0A36280 |
|---|---|
| Description | ThinkPad Battery 19+ (6 Cell Slice - X220, X220T) |
| Power management | 64 Watts/Hr |
| Battery type(s) | Li-Polymer |
| Battery Voltage | 11.1 V |
| Note | Stay unplugged even longer with ThinkPad Battery 19+. This rechargeable six-cell slim external battery uses Lithium-Ion (Li-Ion) technology and easily attaches to our X220. |