ThinkPad Battery 81+ (6 Cell) - Primary Battery

• Lithium-Ion (Li-ion) technology

• 6 cell system battery

• Battery energy (Watt-hours): 44 Wh

• Compatible with the ThinkPad External Battery Charger (40Y7625)

These rechargeable batteries use Lithium-Ion and Lithium-Polymer technology to allow you to stay unplugged for longer. The battery lasts for 44 watt hours on average* and can be recharged with the ThinkPad External Battery Charger (40Y7625). * The life of the battery differs due to many factors. These include: battery conditioning, power management, screen brightness, applications, features and other customer preferences.