Why do I have to plug in my grill? Plugging in your grill or connecting an USB power bank powers the knob lighting and the WEBER CONNECT display. Related articles How do I install an external power bank with a USB-C cable? Do I have to plug in my grill to use the WEBER CONNECT app? Why won’t my USB-C external battery pack turn on my WEBER CONNECT display? How do I plug in my grill? Why isn’t my WEBER CONNECT display turning on?