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: 11.25V Capacity: 2200mAh / 25Wh Warranty: 1 Year Compatible Models and Original Battery Part Number: A31N1519, A540L, A540LA, F540LA, F540LJ, F540SA, F540SC, F540UP7200, R540L, R540LA, R540LJ, R540SA, R540UP, X540L, X540LA, X540LA-1A, X540LA-1C, X540LA-3F, X540LA-3G ** In prevent from purchasing incorrect battery, please compare with your original battery & check the Compatibility at [Specs] below.