This TOSHIBA Satellite 1800, 1800-S203, 1800-S204 AC Adapter is 100% compatable with the TO1501 TOSHIBA Satellite 1800, 1800-S203, 1800-S204 AC Adapter. Our batteries and accessories are made with high quality parts and are guaranteed to meet or exceed the original equipment manufacturers specifications at a reduced price. All batteries are tested for 100% quality control assurance. This TOSHIBA Satellite 1800, 1800-S203, 1800-S204 AC Adapter includes a warranty to guarantee that it has no manufacturing defects.