Dell 48wh Type: 8858X Laptop Battery (Standard Rechargeable Li-Ion) Battery - 11.1V - Original Battery Compatible with the following Dell laptop models: Dell Inspiron 14R (5420) Dell Inspiron 15R (5520) Dell Inspiron 15R (7520) Dell Inspiron 17R (5720) Dell Inspiron 17R (7720) Dell Latitude E5420 Dell Latitude E5420m Dell Latitude E5520 Dell Latitude E5520m Dell Latitude E6420 Dell Latitude E6420n Dell Latitude E6520 Dell Latitude E6520n Dell Vostro 3460 Dell Vostro 356 Compatible with the following Dell laptop battery part numbers: 312-1163 312-1311 8858X 8P3YX HCJWT K4CP5 KJ321 NHXVW P14F P14F001 P15F P15F001 P15F002 P15G P15G001 P16G P16G001 P16G002 PRRRF T54F3 T54FJ T54SJ X57F1