This is a 85 WHr 9 Cell Original Lithium-Ion Primary Battery for XPS M1730 Compatible Notebook Models: XPS: M1730 Dell Part Numbers: HG307, XG510, 0XG510, WG317, 312-0680. Product Specifications: Rating: 11.1V Capacity: 85Wh Color: Black Cell: 9 Cells Technology: Lithium-Ion Contacts: 9 Position Condition: Brand New In Stock: Yes