The Toshiba High Capacity 2nd Battery is designed for Toshiba Portege Series portable computers and provides approximately 4.5 hours of battery life to your PC. The battery snaps on the bottom of the notebook allowing for a comfortable typing angle, and it is the same battery that comes with the system.
Toshiba 2nd Battery Pack Slim SelectBay (Li-Ion, 6 cell, 4000mAh). Battery capacity: 4000 mAh, Battery life (max): 4.5 h, Color of product: Black. Weight: 11.6 oz (330 g). Dimensions (WxDxH): 10.7 x 3.01 x 0.413" (273 x 76.5 x 10.5 mm)