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: 11.1V Capacity: 4400mAh / 49Wh Warranty: 1 Year This battery only compatible with 10.8V and 11.1V version. Compatible Models and Original Battery Part Number: 1010872903, AS07B31, AS07B41, AS07B51, AS07B61, AS07B71, AS07BX1, AS07BX2, Aspire 5220, 5315, 5520, 5530, 5710, 5715, 5720, 5730, 5739, 5920G, 5930, 5935, 5935G, 6530, 6530G, 6920, 6920G ** In prevent from purchasing incorrect battery, please compare with your original battery & check the Compatibility at [Specs] below.