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-Ion Device Voltage: 10.8V Capacity: 4400mAh / 48Wh Warranty: 1 Year Compatible Models and Original Battery Part Number: HP ProBook: 640, 640 G0, 640 G1, 645, 645 G0, 645 G1, 650, 650 G0, 650 G1, 655, 655 G0, 655 G1, 718754-001, 718755-001, 718756-001, 718757-001, CA06, CA06XL, CA09, HSTNN-DB4Y, HSTNN-LB4X ** In prevent from purchasing incorrect battery, please compare with your original battery & check the Compatibility at [Specs] below.