If you own a GeForce-powered XPS 17 or Precision 5750, Dell wants you to contact customer support to work something out. The manufacturer has successfully reproduced the charging issue on a "limited quantity" of laptops and will be reaching out to existing owners as well.
https://www.notebookcheck.net/Dell-finally-addresses-XPS-17-9700-and-Precision-5750-charging-woes-but-the-solution-isn-t-as-simple-as-you-may-think.483673.0.html