The 6-Cell Battery Slice for ThinkPad from Lenovo features Lithium-ion technology and a slim design which attaches to the X220/X230 and keeps it plugged in for long periods. Stay unplugged even longer with ThinkPad Battery 19+. This rechargeable six-cell slim external battery uses Lithium-Ion (Li-Ion) technology and easily.
Supports X220/X230 ThinkPads
Lithium-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