Specifications: Cell quantity: 9 pieces Voltage: 11.1V Capacity: 6,600mAh/73Wh Color: black Dimensions: 208.20 x 58.15 x 39.57 Type: Li-ion Replacement for Acer Aspire 4720 Series this is grace from shenzhen cabellpower , factory for laptop battery ,laptop adapter, power bank.we produce the laptop battery, laptop adapter, power bank.also we deal with the laptop accessory: such as laptop keyboard, laptop hinge ,laptop cover, laptop lcd led cable, laptop cpu fan.laptop dc jack....etc.we have many models laptop battery,laptop adapter，power banks，you can check if any models you like, if any questions feel free to contact me by skype:eros1025 or QQ:330184064