Thomas Shaw's dashboard

Hi, My M1730 has recently started displaying a message each time i go into windows saying "Your battery is reaching the end of it's usable life, please consider buying a replacement".

The laptop is only a year and a half old and has been plugged into the mains the whole time. I have emailed Dell technical support and have heard nothing back. This makes the laptop utterly unsellable if I want a decent price.

I have always gone with dell laptops, but I'm felling pretty unsettled at the moment, seeing as I spent £1440 on this one. What can I do? Please help!