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: 14.8V Capacity: 2200mAh / 33Wh Warranty: 1 Year Compatible Models and Original Battery Part Number: VI04 756478-221 756478-241 756478-421 756478-422 756478-541 756478-851 756479-221 756479-241 756479-421 756479-422 756479-541 756480-241756481-221 HSTNN-DB6I ** In prevent from purchasing incorrect battery, please compare with your original battery & check the Compatibility at [Specs] below.