Need a battery for Acer Laptops/Notebooks with the following model numbers: Travelmate 220, 230, 260, 280 series? BTI has you covered with our premium 8 cell LiIon battery. This product has been engineered to meet or exceed the original manufacturer's specifications and replaces the original Acer part numbers BTP-43D1. All BTI batteries are manufactured and tested under our stringent quality standards and come with an industry leading 18 month manufacturer's warranty. BTI... True to the original.