Specifications:Battery Type: Li-ion - Voltage: 14.8VCapacity: 4400mAhCell: 8 Cellsrecharge cycles: 500Operation time: Around 1.5-3.5hours Specifications:Battery Type: Li-ion - Voltage: 14.8VCapacity: 4400mAhCell: 8 Cellsrecharge cycles: 500Operation time: Around 1.5-3.5hours - Replace Battery Part Number:2F8K3 02F8K3 KJ2PX 0KJ2PX G33TTCompatible with: For DELL Alienware 17 17X Series - For DELL Alienware 18 18X Series - Package included:1 x Laptop Battery