Charge your Apple Watch first when charging multiple devices. If the watch charger is connected to the USB-A port without an Apple Watch connected, unplug and reconnect it before charging.
Due to MacBook charging identification, it's normal to see a plug symbol in the battery icon when charging a MacBook with a third-party wall charger. Charging will revert to normal automatically after around one minute.
Due to Dell's proprietary charging protocol, Dell XPS 15 (9500/9510), Dell Alienware X14, and Dell Mobile Precision Workstation 5570 will not be charged at full speed.
This charger is not compatible with Samsung Galaxy Z Fold 3 and Galaxy Z Fold 4.