Compatible part numbers; 4dmng, 4wy7c, 68dtp, 6hy59 6k73m 6kp1n 6xh008rt13 8tt5w 9k1vp dj9w6 fw1mng019y g35k4 mk1r0mr90y n121y pvj7jt1g4mv1yj7, xrdw2, ygmtn, 0mf6924drm, 312-1387, 312-1390, 312-1392,Callvtp, v8xn3 nt, vr7hm, w6xnm, x29kd, xcmrdcompatible models; inspiron 15 3521, inspiron 15r 5521, inspiron 17 3721, inspiron 17r 5721, dell latitude 3440.