Brand new 14.8V replacement battery for Dell Inspiron 14 3421, 15 3521, Vostro 2521 (XCMRD, MR90Y) Specifications: Voltage: 14.8V Capacity: 2200mAh/33Wh Cells: 4 Colour: Black Suitable Models: Dell Inspiron 14 3421, 14R 5421 15 3521, 15 3531, 15 3537, 15 3542, 15 3543, 15R 5521, 15R 5537 17 3721, 17 5000 series, 17 5748, 17R 5721 3442, 3521, 3531, 3537, 3542, 3543, 3737, 5721, 5748 Latitude 3440, 3540, E3440 Vostro 2421, 2521 Compatible part numbers: 312-1387, 312-1390, 0MF69, 451-BBBF, 49VTP, 4WY7C, 6HY59, 6K73M, DJ9W6, FW1MN, G019Y, MR90Y, T1G4M, V1YJ7, V8VNT, X29KD, XCMRD, XRDW2, YGMTN What's in the box 1 x Replacement Battery