FACTURAMOSCOMPATIBLE PARTS NUMBERS:451-BBID, 451-BBIE, 451-BBIF, FT6D9, 3K7J7, 970V9, 9TJ2JN5YH9, VJXMC, VV0NF, M7T5F, WGCW6, 0K8HC, 1N9C07W6K0, F49WX, NVWGM, CXF66FICHA TECNICA:VOLTAGE: 11.1 VCAPACITY: 5800 MAHCELLS: 6 CELLSRECHARGE CYCLES: 500OPERATION TIME:AROUND 1.5 - 2.5 HOURS (THE ACTUAL OPERATION TIME WILL DEPEND ON HOW MUCH ELECTRICITY IS REQUIRED BY THE DEVICE AND HOW YOU USE IT).COMPATIBLE MODELS:LATITUDE E5440 E5540**GARANTIA DE 6 MESES** POR DEFECTOS DE FABRICACIONSI NO VES TU EQUIPO EN LOS MODELO PUBLICADOS, PODEMOS VERIFICAR COMPATIBILIDAD