Go to Amazon.com : http://www.amazon.com/gp/product/B00AFEKA10?tag=theatrecat-20
Gateway P7811FX Tech Rover? Max-Life Series 9-Cell [High-Capacity] Replacement Battery
100 Compatible - Will not void your original laptop warranty
Tech Rover Quality product with 30-DAY Worry-Free Return Policy
Brand New Battery 6600-7800 mAh Effective Capacity
All Tech Rover branded items carry a 1 year warranty against manufacturer defects
9-Cell High Throughput Battery Please note this an extended capacity battery and may protrude slightly from your laptop