Hi, my dell AC adapter stopped working some days ago, I'm abroad and the only adapter I could buy is an universal type. When I plug-in the adapter, laptop works perfectly, but battery doesn't charge.

During booting process, it appears the following message: "WARNING: The AC adapter type cannot be determined. This will prevent optimal system performance. Please check AC adapter connect properly, remove AC adapter and plug-in it again, thanks".

I checked in BIOS settings, but the only thing I could do was to hide this warning message.

I tried to update BIOS by installing the latest version (downloaded from dell website), but I can't install it because a warning message tells me the battery is flat and so it can't go on.

What should I do? ...I need to charge my laptop!!

Thanks in advance