Goingpower Battery for Fujitsu siemens LifeBook T4210 T4215 t4220 tablet pc FPCBP155 Fpcbp155ap - 18 Months Warranty [li-ion 6-cell 4400mAh] 100% Compatible - Will not void your original laptop warranty Tech Rover&trade; Quality product with 30-DAY Worry-Free Return Policy Brand New Battery, 4400 mAh, 5200 mAh, Effective Capacity All Tech Rover&trade; branded items carry a 6 month warranty against manufacturer defects. 6-Cell High Throughput Battery