MAIN OVERVIEW FEATURES: Application/Usage: NotebookBattery Rechargeable: YesBattery Size: Proprietary Battery SizeBattery Chemistry: Lithium Ion (Li-Ion)Battery Capacity: 5600 mAhOutput Voltage: 10.8 V DCCompatible to OEM Part Number: 9TJ2J 451-BBIE Compatibility: Dell Latitude Notebooks:E5440E5540Environmentally Friendly: YesEnvironmental Certification: WEEELimited Warranty: 18 Month