New Dell Inspiron 14 3421 14R 5421 15 3531 15R 5521 3737 5749 5721 DL73 Battery Specifications Condition: New Model: DL73 - brand new replacement Purpose: Dell Inspiron 14 3421, 14R 5421, 15 3531, 15R 5521, 17 3737, 17 5749, 17R 5721 Voltage: 10.8V (11.1V) Capacity: 4000 mAh (44Wh) Laptop Dedicated Battery: Dell Inspiron 14 3421 Dell Inspiron 14R 5421 Dell Inspiron 15 3531 Dell Inspiron 15R 5521 Dell Inspiron 17 3737 Dell Inspiron 17 5749 Dell Inspiron 17R 5721 Replaces battery models with the following designations: 312-1387 FW1MN MR90Y XCMRD Illustrative pictures, show an example of the product: The new Dell Inspiron 14 3421 14R 5421 15 3531 15R 5521 3737 5749 5721 battery comes from the offer of Kompre.pl – an authorized seller of post-lease business class computers. We also have other Dell models – check: https://kompre.pl/pl/c/Laptopy-Dell/364. Each unit is tested, cleaned and prepared to work with the current system. A long door-to-door warranty ensures support and security of your purchase.