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 Envy 15, 15z, 17 / HP Envy TouchSmart 15, 15t, 17, 17t, m7 / HP Pavilion 14, 15, 17, 17z / PI06, 709988-421, 710416-001, 710417-001, HSTNN-LB4O, HSTNN-UB4N ** In prevent from purchasing incorrect battery, please compare with your original battery & check the Compatibility at [Specs] below.