Lenovo Battery ThinkPad X220/X230 Tablet 6 Cell - For Notebook - Battery Rechargeable - 63 Wh - Lithium Ion (Li-Ion) 0A36317

Stay unplugged longer with these genuine ThinkPad batteries. These rechargeable batteries use Lithium-Ion technology and can be used as replacement for aging system batteries or as a convenient spare battery. Lithium-Ion (Li-Ion) technology 6 cell system battery Battery energy (Watt-hours): 63 Wh Not compatible with the ThinkPad External Battery Charger (40Y7625)