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Need a battery for GATEWAY Laptops/Notebooks with the following model numbers: NV50A, NV51B, NV53, NV53A, NV55C, NV73A, NV79, NV79C; various Acer Aspire & Travelmate models? BTI has you covered with our premium 6 cell LiIon battery. This product has been engineered to meet or exceed the original manufacturer's specifications and replaces the original GATEWAY part numbers AS10D31, 3ICR19/65-2, AK.006BT.080. 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.