CoolGo Inspiron i15RVT-3714BLK Laptop Battery for Dell Inspiron 3421 5421 3521 5521 3721 5721 14 15 17 Fits N121y Mr90y [Li-ion 6-cell 5200mAh/56WH 10.8V] Battery type: Li-ion; Capacity: 5200mAh/56WH; Cells: 6-cell; Voltage: 10.8V(Compatible 11.1V). CE-/FCC-/RoHS-Certified for safety. 24 x 7 email support, 12-month hassle-free warranty. Compatible0MF69 24DRM 312-1387 312-1392 312-1433 49VTP 4WY7C 68DTP 6HY59 6KP1N 6XH00 8RT13 9K1VP DJ9W6 FW1MN G35K4 MK1R0 MR90Y PVJ7J T1G4M V1YJ7 VR7HM W6XNM X29KD XRDW2 YGMTN V8VNT 312-1390 8TT5W XCMRD 4DMNG G019Y 6K73M N121Y battery SuitDell INSPIRON 17 3721 INSPIRON 17R 5721 INSPIRON 15R 3000 battery 30Days No Worry Return,6monthes replacement Warranty.