DR. BATTERY Professional Series Replacement Notebook Battery: Dr. Battery Professional Series battery is made of quality materials, top grade battery cells to bring your laptop back to life and maintain your laptop service time. Safety First Criteria: All of Dr. Battery Professional Series batteries have short circuit, overheat, and overload protections to maintain the safety of usage. Condition: New Cell Type: Lithium Polymer Device Voltage: 11.1V Capacity: 4400mAh / 49Wh Warranty: 1 Year Compatible Models and Original Battery Part Number: CM03XL, 717376-001, HP EliteBook: 1020, 700, 745, 750, 755, 840, 840 G2, 845, 850, HP Elite x2 1011, HP ZBook: 14, 15u ** In prevent from purchasing incorrect battery, please compare with your original battery & check the Compatibility at [Specs] below.