Laptop Battery Pros Replacement Battery for HP Compaq Business Laptops: * Lithium-ion * Power: 11.1V * 6-cells * Compatible with HP Compaq Business 6720t, 7400, 8200, 8400, 8500, 8700 Series, NC8200, NC8400 NW8200, NW8400, NW9400, NX8200, NX8400, NX9400, Series laptops * Color: Black