This is a Brand New Replacement Battery for Tecra Laptops. Toshiba Part Numbers: PA2510UR, PA2510U, PA2510UR, PA2451URN, Compatible Toshiba Models: Tecra 8000. Product Specifications: Rating: 10.8V Capacity: 4000 mAh Size: 6.10" x 3.30" x 0.76" Color: Black Technology: Lithium-Ion Condition: Brand New In Stock: Yes