Laptop Battery 11.1V 4400mAh MR90Y Dell N121Y for DELL Inspiron 3421 5421 3521 5521 3721 5721 (10pc)

New Laptop Battery for Dell Inspiron  14 15 17 Series / 14 (3421), 14R (5421), 14R (5437),15 (3521),15R (5521), 15R (5537), 17 (3721), 17 (3737), 17R (5721), 17R (5737),fit Dell Latitude 3440 3540. Specifications: Attention: For the new battery, we suggest all of our customers fully charge it by AC power adapter. Maybe it take a long period, the capacity was strain out by inner PCB circuit. In order to protect your battery life, you can fully charge it to 100% and drain to 2% ,it's a cycle and the capacity will recover. it's better to make normal use after 2 cycles and charge the battery regularly at least once a month. Battery Type: Li-ion Voltage: 11.1V; Capacity: 4400mAh; Cells: 6-cell Color: Black; 100% Brand New Cells. Rechargeable Up to 500 cycls over life of battery; High energy efficiency and extended battery life. Compatible with the following models:Inspiron 14-3421, Inspiron 14-3437, Inspiron 14-5421, Inspiron 14-N3421, Inspiron 14-N5421, Inspiron 14R-3421, Inspiron 14R-34