The Genuine ThinkPad Battery 77+ 90Wh is designed specifically for Lenovo laptops, including the ThinkPad P50, P51, and P52 models. With a capacity of 90 mAh and a voltage of 11V, this Li-Ion battery features 9 cells for long-lasting power. Its sleek black design complements the aesthetics of your device, making it a perfect replacement or spare battery for on-the-go use. Compatible with the ThinkPad product line, this battery ensures reliable performance for your computing needs.