Hello, I've purchased a precision 5510 about two years ago, the battery has been working perfectly ever since, until today, where it suddenly showed an error, and no longer operating:
Your battery no longer operates and needs to be replaced.
Note that in the morning, the battery was working perfectly and lasts about 6~7 hours.
I've tried upgrading the BIOS, disconnecting the battery and reconnecting, nothing works.
If the system is under warranty, call Dell and they'll replace the battery. if it is out of warranty, you'll need to purchase a new battery -- for now, it may work, but it's clear that it has failed.