This is a 6 Cell Li-Ion Battery. New Original Battery is designed for use with IBM/Lenovo ThinkPad X300 Laptop. Compatible ThinkPad Models: IBM ThinkPad : X300. IBM Parts: 43R1967. Product Specifications: Rating 10.8V Power: 4.0 Amp/Hr Color: Black Cells 6 Li-Ion Cells Technology: Lit-Ion Condition: Brand New Warranty: 1 year