9-cell Laptop Battery for Dell 312-0504 312-0513 312-0518 312-0520 • Type: Li-Ion, Voltage:11.1V Capacity:6600mAh;9 cells • 1 year replacement warranty. • High capacity battery certified by CE and RoHS, This battery was tested and proven to match and/or exceed original specifications of DELL products • Fit Machine Models: Dell Inspiron 1520 1521 1720 1721 Vostro 1500 1700; Replacement for Dell 312-0504 312-0513 312-0518 312-0520