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Need a battery for DELL Laptops/Notebooks with the following model numbers: Studio 1735, 1737 (9-cells)? BTI has you covered with our premium 9 cell LiIon battery. This product has been engineered to meet or exceed the original manufacturer's specifications and replaces the original DELL part numbers 312-0712, KM973, PW835, 0PW823. 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.