Lenovo part: Lenovo ThinkPad Battery(9 Cell-X220)
* Lithium-Ion (Li-Ion) technology * Six-cell, rechargeable system battery, 44Wh * Standard system battery specifications * Over-discharge protection For more information on batteries.
|Description||ThinkPad Battery 29++ (9 Cell - X220)|
|Power management||4.0 Amp/Hr|
|Battery type(s)||6 Cell Prismatic|
|Battery Voltage||11.1 V|
|Note||Stay unplugged longer with the ThinkPad Battery 66+ (6 cell). This rechargeable battery uses Lithium-Ion (Li-Ion) technology and can be used as replacement for aging system batteries or as a convenient spare battery.|