Replacement notebook battery (4-cells) for DELL Inspiron 14 (3421) 14R (5421) 14R (5437) 15 (3521) 15R (5521); replaces 312-1387 XRDW2 T1G4M 4WY7C FW1MN PVJ7J V8VNT; Specs 4-cells Lithium Ion 14.4v 2600mAh 37Wh