MAIN OVERVIEW FEATURES: Application/Usage: NotebookBattery Rechargeable: YesBattery Size: Proprietary Battery SizeBattery Chemistry: Lithium Ion (Li-Ion)Height: 0.8"Width: 10.4"Depth: 2"Weight (Approximate): 15.04 ozCompatible to OEM Part Number: QK647AAQK647UTCompatibility: HP-Compaq - ProBook 4730s HP-Compaq - ProBook 4740sEnvironmentally Friendly: YesEnvironmental Certification: RoHS