【Compatible Laptop Models】Dell Alienware 17 R2, Alienware 17 R3, ALW17ED-1728, ALW17ED-1828T, ALW17ED-2728, ALW17ED-3728, ALW17ED-3828, ALW17ED-4718, ALW17ED-4738, ALW17ED-4838, ALW17ER-4738, ALW17ER-4838, AW17R3-8342SLV ,AW17R3-7092SLV Series(See Description Fit Laptop Models) Notebook Battery.