Specifications: 6 Cell, Li-ion battery, Rated at 11.1V 5200mAh(Not Fit P/N PA3817U-1BRS PA3817U-1BAS) CE-/RoHS-/FCC- Certified and Built-in circuit protection ensure both safety and stability. 100% Brand New from Manufacturer. Rechargeable Up to 600 times over life of battery Equipped with Higher Quality Cells yet has Same Size & Shape as an OEM Battery This Product has 12 Months Replacement Warranty! With Hassle-free Customer Service