Battery Specifications :Item: Battery for Acer 4220, 4310, 4520, 4710, 4720, 4730Condition: NewType: Lithium - ionCapacity: 6 CellsVoltage: 10.8V - 11.1VWarranty: 90 DaysAlso compatible with: Acer 4735, 4736, 4920....................................................................................................................................................................For Order, Please contact :- 085272738485 (Via SMS)- 20C5B2A5 (Via BBM)Feel free to contact me for more information about battery you are looking for.Thanks