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: 11.25V Capacity: 4000mAh / 45Wh Warranty: 1 Year Compatible Laptop Model: HP Elitebook: 720 G1 720 G2 725 G1 725 G2 820 G1 820 G2 825 G1 825 G2 Compatible Original Battery Part Number: 717378-001, HSTNN-IB4T, HSTNN-LB4T, SB03046XL, SB03XL ** In prevent from purchasing incorrect battery, please compare with your original battery & check the Compatibility at [Specs] below.