This IBM ThinkPad i Series (1800) AC Adapter is 100% compatable with the IB1507 IBM ThinkPad i Series (1800) 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 IBM ThinkPad i Series (1800) AC Adapter includes a warranty to guarantee that it has no manufacturing defects.