RUBAN (TM) New Laptop Replacement Battery for Dell Inspiron Dell 1520, 1720, 530s, Dell Vostro 1500, 1521, 1700, 1721, Replacement for parts UW280, 0UW280, NR239, 312-0589, 451-10477, FK890, GK479 ,312-0504, 312-0575, 312-0576, 312-0590, 312-0594, FP282 - 18 Months Warranty (9-Cell)