MAIN OVERVIEW FEATURES: Application/Usage: NotebookBattery Rechargeable: YesBattery Size: Proprietary Battery Size,AABattery Chemistry: Lithium Ion (Li-Ion)Battery Capacity: 4400 mAhOutput Voltage: 10.8 V DCCompatibility: HP/Compaq ProBook 4330s NotebookRecycled: YesEnvironmentally Friendly: YesEnvironmental Certification: WEEELimited Warranty: 18 Month