[Warranty: 24 x 7 email support12 Months Warranty 30 days money return guarantee.Note: Amazon return windows will close after one month don’t worry about it you can click on seller store on right corner “ask a question” and contact seller directly for 12 month warranty.Press [Ctrl + F] to search your laptop model/part number. Compatible for Dell Inspiron 14 14R Series 14-3421 14R-3437 14R-5421 14R-5437 For Dell Inspiron 15 15R Series 15-3521 15-3531 15-3537 15-3542 15R-5521 15R-5537 For Dell Inspiron 17 17R Series 17-3721 17-3737 17-5749 17R-5721 17R-5737 M731R-5735 M531R-5535 Latitude E3440 E3540 Series Vostro 2421 2521 Compatible For Dell Inspiron 14R (5421 5437) Inspiron 15R (3542) Inspiron 17R (5521 5537)Fits: 0MF69 49VTP 68DTP 6KP1N 8TT5W FW1MN MK1R0 PVJ7J V8VNT X29KD YGMTN 24DRM 4DMNG 6HY59 6XH00 312-1390 312-1392 9K1VP G019Y MR90Y T1G4M VR7HM XCMRD 4WY7C 6K73M 8RT13 DJ9W6 G35K4 N121Y V1YJ7 W6XNM XRDW2 312-1387 312-1433 312-1387 312-1433 312-1390 312-1392 451-12107 451-12108 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. CE-/FCC-/RoHS-Certified for safety，over voltage protection short circuit protection over current protection Battery type: Li-ion;Voltage: 11.1V; Capacity: 65Wh;Cells: 6-cells; Color: Black;Each of our product is CE-/FCC-/RoHS-Certified.]