Battery type: Li-ploymer Voltage: 7.6 V(Compatible with 7.4V) Capacity: 5000mAh/38Wh Cell:3Cells 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. ; Built-in circuit protection ensures both safety and stability CE FCC Certificates for safety;12 Months Warranty! 30 Days Money return guarantee; Part number: C21N1347 2ICP4/63/134 *Fit for: Asus X550 X555 X555LA X555LD X555LN Series