SLODA 6 Cell High Performance New Laptop Battery for Dell Inspiron 14R Series N3421 N5421 Inspiron 5437, Dell Inspiron 15 Series (3521, 5521, 5537), Dell Inspiron 17 Series (3721, 3737, 5721, 5737), Latitude 3440, Latitude 3540, Vostro 2421, Vostro 2521 [Li-ion 11.1V 5200mAh] Battery Type: Li-ion; Voltage: 11.1V; Capacity: 5200mAh; 6 Cell. 100% New from Manufacturer; High Performance N3421 3521 Replacement Battery. Overcharger and Discharger Circuit Protection; CE-/FCC-/RoHS-Certified for safety. Contain with Durable cells; Low power consumption IC design; Tested with strict quality control standards; Direct warranty from Manufacturer. Warranty: 12 Months Warranty, 30 days money return guarantee; 24 x 7 email support.