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Need a battery for APPLE Laptops/Notebooks with the following model numbers: MacBook Pro 15, 15.4 (Aluminum)? BTI has you covered with our premium 3 cell LiPolymer battery. This product has been engineered to meet or exceed the original manufacturer's specifications and replaces the original APPLE part numbers A1281, MB772LL/A, MB772LLA. 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.