Extended Capacity Intelligent Battery Pack This is a 12 cell Lithium Ion rechargeable battery designed to work in Compaq Presario R3000, R4000, x6000, Hewlett Packard Pavilion zd8000, zv5000, zv6000, zx5000 and Compaq HP NX9100, NX9105, NX9110, NX9600 series laptop and notebook computers. This battery ships fully charged, tested and ready to work.