Laptop Battery - for 4420, 4520, 4720, 5420, 5425, 5520, 5525, 5720, 7420, 7520, 7720, 14R, M5Y0X, NHXVW, T54FJ ,14R Turbo, 14R-4420, 14R-5420, 14R-5425, 14R-7420, 14R-SE, 14R-SE-4420, 14R-SE-5420, 14R-SE-7420, 15R, 15R Turbo, 15R-4520, 15R-5520, 15R-5525, 15R-7520, 15R-SE, 15R-SE-4520, 15R-SE-5520, 15R-SE-7520, 17R, 17R Turbo, 17R-4720, 17R-5720, 17R-7720, 17R-SE, 17R-SE-4720, 17R-SE-5720, 17R-SE-7720, M421R , M521R , N4420 , N4520 , N4720 , N5420 , N5520 , N5720 , N7420 , N7520,Latitude E5420, E5420, E5420 ATG, E5420 N-Series, E5420M, E5430, E5520, E5520, E5520 BRC 6, E5520 N-Series, E5520M, E5530, E6420, E6420, E6420 ATG, E6420 ATG, E6420 N-Series, E6420 XFR, E6430, E6430 ATG, E6440, E6520, E6520, E6530, Vostro 3460, 3560 Does the battery in your notebook not have a large enough capacity, or is it almost impossible to work without a connection to a power outlet? Do you wish you could buy a new one but the original replacement is just too expensive...