I realised I had messed something up in the registry editor when trying to get rid of the notification indicating slow charging on the battery icon - resetting my changes there fixed the problem.
My laptop was not charging and displayed a warning that it wasn't getting enough power. In the BIOS it does detect the charger but only at 5W, instead of the 130W of charge. I have had the laptop for over a year with no problems. I have tried to update the BIOS, reset the BIOS settings (with and without the charger connected) and no luck. Dell Update says there are no updates to be had, and I have tried uninstalling and reinstalling Dell Power Manager. There is no visible damage to the charger cable and the charging light is on. I have used Device Manager and uninstalled then reinstalled the battery options.  Any help would be greatly appreciated!
Dell XPS 15 9510 Charging at 5W instead of 130W