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: 11.4V Capacity: 3900mAh / 44Wh Warranty: 1 Year Compatible Models and Original Battery Part Number: HP ProBook 640 G2, 645 G2, 650 G2, 655 G2 / 801554-001, CI03, CI03XL, CIO3, CIO3XL, HSTNN-UB6Q ** In prevent from purchasing incorrect battery, please compare with your original battery & check the Compatibility at [Specs] below.