Extend the runtime of your ThinkPad with the Battery 57++. It has 9 cells and so lasts for an incredible 100 watt hours*. It can be used as a replacement or spare for older ThinkPad laptops. 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.
Features & Benefits
Compatible with W541, W540, T440p, T540p, W540, L440 and L540
Safeguarded with a chip to authenticate itself with Lenovo systems