Number of Batteries: 1 Lithium ion batteries required. (included) Battery Weight: 340 Grams Compatible Devices: Laptop, Notebook Battery Cell Composition: Lithium Ion Battery Capacity: 4840 Milliampere Hour (mAh) Capacity: 76WH/4840MAH Cell: 4-Cell Voltage: 15.2V Battery type: Li-ion Replace Part Number: TDW5P V9XD7 0V9XD7 4RRR3 04RRR3 JFWX7 0JFWX7 Compatible Models: Dell Alienware 13, Alienware 13 R3, ALW13C-D2718, ALW13CR-1738, ALW13CR-2508, ALW13CR-2718, ALW13CR-2738, ALW13CR-2838 Series. Safety: All products are rigorously tested to ensure correct voltage, circuit protection, capacity, stable current, low self-discharge and guaranteed battery life.