My old adapter was still powering my computer but nothing else. This power supply is a 90W supply and the system BIOS on my DELL E1705 recognizes it & it charges correctly. Please don't be fooled into buying the cheaper versions from other vendors. I have had an experience with cheaper power supplies that burn themselves out after a year, to the day!. This is especially true if you are using USB devices that need to draw power from the laptop via the USB port. I know this from personal experience. This supply is an real OEM replacement for my original laptop power supply, not just a cheaper knockoff.
The product is working perfectly. I plugged it in and it worked right away. My screen no longer displays the "AC Adapter is not recognized" upon powering up and the battery is charging.