Description:( Ctrl+F to search your model )

Capacity:40WH
Voltage:14.8 V
Battery Type: Li-ion
Cells:4-cell
Compatible Model:
Dell Vostro Series
2421 2521 3421 3521

Dell Inspiron 14 14R Series
Inspiron 14 3421 3437 3442 5421 N3421 N5421
Inspiron 14R 3421 3437 5421 5437 N3421 N5421

Dell Inspiron 15 15R Series
Inspiron 15 3521 3531 3536 3537 3541 3542 3543 3878 5566
Inspiron 15R 3521 3537 5537 5521 N3521 N5521 N5537

Dell Inspiron 17 17R Series
Inspiron 17 3721 3737 5721 5748 5749 N3721
Inspiron 17R 5721 5727 5737 N3721 N3737 N5721 N5737

Dell Latitude Series
Latitude 14 3000 Series 3440 E3440
Latitude 15 3000 Series 3540 E3540

Dell Part Number
312-1387 312-1433 312-1390 312-1392 451-12107 451-12108
XRDW2 V8VNT 0MF69 49VTP 68DTP 6KP1N 8TT5W FW1MN
MK1R0 PVJ7J V8VNT X29KD YGMTN 24DRM 4DMNG 6HY59
6XH00 9K1VP G019Y MR90Y T1G4M VR7HM XCMRD 4WY7C
6K73M 8RT13 DJ9W6 G35K4 N121Y V1YJ7 W6XNM

Installation steps
1.You need to turn off your laptop and disconnect the power.
2.Turn the laptop to the back, install a new battery, and fix it with a tool.
3.When the computer is turned on, if it is not recognized, it is recommended to update the BIOS settings.
4.Discharge the new battery use to 5%(not to 0%) and then charge to 95%, and cycle 3-4 times.

Note: Pls feel free to contact us if you have any problem.