Model: AP18E7M AP18E8M,Battery Type: Lithium polymer,Voltage: 15.4V, Capacity: 58.75Wh/3815mAh; Cells: 4-cell,Color:Black with Two Free Screwdrivers.100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery.(Note 1: In order to find the right model, please open the back case of your laptop and check the model number of your original battery.2: Before installing the replacement battery, please read the manual carefully.)