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CompatibilityGenuine Dell-branded parts undergo rigorous testing by qualified engineers to ensure compatibility and reliability in your Dell systemOur sustaining qualification process allows for testing and certification of the newest technology on your Dell systemQualityDell uses only OEM grade quality componentsTechnical SupportThis product requires removal of the back cover of the system.4 V - 1 Find instructions for battery removal and installation in your system's service manual.With a capacity of up to 42 Wh, the battery lets your laptop work seamlessly when you are on the move. No more worries about running out of battery power! Service manuals can be found using your service tag number or model name on the Dell Support Home Page .