Started receiving the error message at startup

"warning The battery cannot be identified. This system will be unable to charge this battery press any key to continue"

I did search the Internet and this forum but have not find any workable solution. My latop came with BIOS version 2.1.0 A07, tried to refresh the BIOS with the same version, and higher versions all the way to version A15 but no luck.

The battery does hold charge and the message disappear if I remove the battery and bootup with the AC adapter alone.

OS vista 32 bit
Laptop: Inspiron 1501

Any help appreciated.

Thanks