Model: N1WM4 ; Voltage: 15.2V ; Capacity: 62Wh Replacement for Part Number: N1WM4 2VMGK Compatible Models: For Dell Alienware 13 R2 13.3" Series Laptop Security: All Anepoch products are Certified by CE, FCC for safety. Strict guidelines for compatibility, and standards compliance for environment safety. Support: 24 x 7 Email support, Rest assured with 30 days Refund12 months Replacement,if there is any problem, please feel free to contact me and I will solve it for you immediately.