Model Name: 7WNW1 Condition: Brand New Battery Type: Li-ion Battery Voltage: 11.4V Battery Capacity: 51Wh/3-Cell Compatible Paer Number: 7WNW1 DMF8C 0DMF8C DMF0C GK3D3 0GK3D3 GK3D3 6NNCF DP3KF 451-BCHV Compatible Models: (use "Ctrl+F" to find your model quickly) For Dell Latitude 7424 Rugged Extreme Series . For Dell Latitude 5424 Rugged Extreme Series . For Dell Latitude 5420 Rugged Extreme Series . For Dell P137G P85G P86G P137G001 P137G002 P85G001 P86G001. 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.