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.
Compatible with X220, X230
• Lithium-Ion (Li-ion) technology
• 4 cell system battery
• Battery energy (Watt-hours): 29 Wh
• Compatible with the ThinkPad External Battery Charger (40Y7625)