BULL-TECH New Laptop Battery for Dell Inspiron 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 Battery type: 6 Cell Li-Polymer; Capacity: 48Wh; Voltage: 11.1V Fit Part number:Dell G019Y 0MF69 6HY59 4DMNG 8RT13 8TT5W 68DTP 6XH00 9K1VP VR7HM V1YJ7 W6XNM 312-1390 6K73M ,Compatible PN:MR90Y N121Y G35K4 MK1R0 YGMTN Compatible Models: Dell Inspiron Dell 3421 Series | Dell 3437 Series | Dell N5521 Series | Dell N5537 Series | Dell N5721 Series | Dell N5737 Series |Dell 5437 Series CE FCC Certified for safety,100% OEM compatible Warranty: 12 Months Warranty, 30 days money return guarantee