This Clublaptop P-Power replacement adapter for Hp Pavilion DV7-3140SF DV7-3140SO is designed to provide reliable power and charge to your laptop. Made from highest quality parts each CL replacement adapter conforms to specifications similar to original in its appearance, size and quality. Each CL replacement adapter comes with high quality power cord to ensure proper power supply to your laptop. Each adapter also passes necessary authentication certifications like CE, ROHS etc. before leaving the factory, so you can be rest assured for its quality, durability and performance. Please note that all images are indicative, actual product label may vary. Before placing the order of the adapter please cross check that you have selected right adapter for your laptop. Please check the adapter's voltage and current with the requirment of laptop. Adapter output current laptop rated current, adapter output volatege and notebook voltage deviation <= +/-5%. Please also check adapter pin with image before place order. If the adapter pin/tip is incorrect, it wont fit in your laptop. If you need more help on this you can contact us at rceretail@ gmail . COM.