Toshiba Satellite PA3727U-1BRS SUPERIOR GRADE Tech Rover Brand 12-Cell (Super High-Capacity) 10400mAH Battery 100% Compatible - Will not void your original laptop warranty Tech Rover&trade; Quality product with 30-DAY Worry-Free Return Policy Brand New Battery, 8800 - 10400 mAh, Effective Capacity All Tech Rover&trade; branded items carry a 1 year warranty against manufacturer defects. 12-Cell [Extended-Capacity] Battery *Comfortable fit: A natural and comfortable angle elevates your notebook for easier typing. Improved wrist posture promotes more relaxed working conditions and also for better heat dissipation