Enhance your mobile productivity with the Lenovo internal laptop battery, designed specifically for the ThinkPad P1 and X1 Extreme models. This 4-cell, 80Wh lithium-ion battery boasts an impressive capacity of 5235mAh, enabling you to work longer without the inconvenience of constant recharging. The battery operates at a nominal voltage of 15.36V, ensuring stable and reliable power delivery for your demanding tasks.