Lenovo - TP Battery 68+ (6 Cell)

The ThinkPad Battery is a 6 cell Lithium-Ion battery which lasts for 72 watt hours* on average. It is equipped with over-discharge protection, to help prolong the life of the battery, and is rechargeable. *Battery life varies due to many factors. These include: applications, battery conditioning, features, screen brightness, power management and other customer preferences.