Symptoms
The following article provides information about a problem seen with the Precision 7530/7730 mobile workstations and the battery not charging when connected to the TB18 dock.
Precision Mobile battery is not charging on TB18 docking station?
The Precision M7530 and M7730 workstations may report that the system battery is not charging through the Dell TB18DC Thunderbolt dock. When connected straight to an AC adapter the battery charges as expected.
Resolution
Final Resolution
To fully resolve this issue, the BIOS needs to be updated to the latest revision:
Go to the Dell Support Site
Enter your service tag or express service code to get drivers specific to how your system shipped
Alternatively you can choose your system from the product list to get a general list of drivers for that system
Click on the Drivers and Downloads drawer in the menu
Ensure you have the correct operating system set
Select BIOS from the category dropdown
Locate the BIOS update and verify it's revision 1.7.0 or newer
Click on the download link
Once you double click on the install file - follow the onscreen instructions to update to this revision
Note: Your system will restart while it flashes your BIOS to the most recent revision. Best Practice is to have the system connected to a constant source of power throughout this update.
