It comes with a sleek body which is engineered for better performance. Made of premium quality material, this dell inspiron 3521 battery has a sturdy outer cover to ensure its longevity. Be it long hours of office work or watching your favourite movies or videos, this laptop battery will impress you with its quality performance me. With dell inspiron 3521 battery, you can now enjoy long hours of standby time and user time as well. It also gives you hassle free navigation with the adequately powered technology. The dell laptop battery this battery replaces the following sku / part numbers: 0mf69 24drm 312-1387 312-1390 312-1392 312-1433 451-12107 451-12108 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.