Amsahr&reg; Replacement Battery for Dell XPS 14, XPS 14(L401X), XPS 15, XPS 15(L501X), XPS 15(L521X), XPS 17, XPS 17(L701X), XPS L502X, XPS L702X, 312-1123, J70W7, JWPHF (9 Cell, 6600 mAh) - Includes Mini Optical Mouse with Retractable USB cord