Brand new 11.1V replacement battery for Battery for Dell Inspiron 15 3521, Latitude 3540, Vostro 2521 (XCMRD) Specifications: Voltage: 11.1V Capacity: 4400mAh/49Wh Cells: 6 Colour: Black Suitable Models: Dell Inspiron 14 3421, 14R 5421 15 3521, 15 3521, 15 3531, 15 3537, 15 3737, 15R 5521 17 3721, 17R 5721 3421, 3521, 3531, 3537, 3721, 3737, 3737, 5421, 5521, 5721, 5721 Dell Latitude 3440, 3540 Vostro 2421, 2521 Compatible part numbers: 312-1387, 312-1390, 312-1392, 312-1433, 0MF69, 24DRM, 49VTP, 4DMNG, 4WY7C, 68DTP, 6HY59, 6K73M, 6KP1N, 6XH00, 8RT13, 8TT5W, 9K1VP, DJ9W6, FW1MN, G019Y, G35K4, MK1R0, MR90Y, N121Y, PVJ7J, T1G4M, V1YJ7, V8VNT, VR7HM, W6XNM, X29KD, XCMRD, XRDW2, YGMTN What's in the box 1 x Replacement Battery