Dekcell Laptop Battery for Dell Inspiron Lithium Ion Laptop Battery For Dell Inspiron... Voltage: 11.10V Capacity: 4800mAh, 6 Cells This replacement Laptop Battery is specially designed for Dell Inspiron 1520, 1521, 1720, 1721,... It is compatible with the following Dell Part Numbers: 312-0504, 312-0575, 312-0576, 312-0576,...