Extended Battery for Dell Inspiron 1521, 1721, 1520, Vostro 1500, 1700, 1720 (312-0575, 312-0594, GK479, 312-0504, 312-0590, 451-10476, 312-0576, FP282, 312-0513, 312-0518) Certification: CE, FCC, RoHS