Y9M6F Battery For Dell Alienware M15 R2 ALIENWARE M17 R2 Laptop - Compatible Part Numbers:  Dell Alienware M15 ALW15M-D4746W, Alienware m17 R2-C7XD9, Alienware M15 ALW15M-D4725B  - Battery Type: Li-ion, Battery Volt: 11.7V, Capacity: 6490mAh (76Wh), Batte