This is a brand new Dell Inspiron 640m battery.

We are a US based business with knowledgeable support staff to assist you before and after the sale. YES, we have a phone number and real people answer your call! Free technical support is available if you need additional help in diagnosing power problems with your battery, ac power adapter or battery meter software.

All our products carry a full 2 Year warranty and every battery is charged and tested before it ships. We provide a 30 day money back guarantee if you are not completely satisfied. We are so confident in the quality of our batteries, we will pay for any and all shipping expenses if our product fails to perform in the first 30 days you have our battery, even if it is not our fault.

You can expect about 4 -5 hours of run time with this Dell Inspiron 640m battery when new, depending on your energy use. If you are looking for even longer battery run times, check out our extended run battery for your HP laptop (our DELL-640mXT).