As a leading manufacturer of portable computer power accessories, Battery Technology is dedicated to providing innovation, reliable & affordable battery technology to generate power & functionality for notebook computers, camcorders, portable peripherals & cellular phones. This product is designed for HP Compaq Business Notebook NC4200 Series Compaq Business Notebook NC4400 Series, Compaq Tablet TC4200 Series, Compaq Tablet TC4400 Series. Features Power Type: Li Ion Power: 11.1V, 5000m Ah Compatibility: Business Notebook NC4200, NC4400; Tablet TC4200, TC4400 series OEM P/N: PB991A, HSTNNIB12, 365425-003, 381373-001, 383510-001