Model Name: WY9DX Condition: Brand New Battery Type: Li-ion Battery Voltage: 11.4V Battery Capacity: 42Wh/3500mAh Compatible Paer Number: WY9DX RJ40G 01K2CF 075X16 0WK3F1 0M3KCN 005R42 Compatible Models: (use "Ctrl+F" to find your model quickly) Dell Latitude 14 5420 series： Dell Latitude 14 5420 CHKFM； Dell Latitude 14 5420 FDTCY； Dell Latitude 14 5420 XPC5H. Dell Latitude 15 5520 series： Dell Latitude 15 5520 39V1H； Dell Latitude 15 5520 FPKNM. Dell Precision 15 3560 series： Dell Precision 15 3560 3H45Y；Dell Precision 15 3560 4MTF7； Dell Precision 15 3560 758J7；Dell Precision 15 3560 7RV10； Dell Precision 15 3560 F3T9T. Dell P137G P137G001 ,Dell P104F P104F001 P104F002. Attention: The Dell laptop models on this product page are compatible with 2 battery models: WY9DX (42Wh 3-Cell) , RJ40G(63Wh 4-Cell). Instructions for use: Please install the battery correctly and ensure that the battery interface and the motherboard are firmly connected. Please use the original charger to charge the laptop. Please open the back cover of the laptop before purchasing to confirm the original battery type is the same as the picture.