Use this USB to HDMI Power Injector from Hall Technologies to solve an issue where there is not enough power provided from your HDMI source for display or extension. On one end is an HDMI-A female-to-male adapter, and on the other end is a USB-A male connector that plugs into a separately available, regulated 5V power source. The adapter is a compact, lightweight cable design that doesn't take up much space.
NOTE: It is recommended to plug in the adapter and cable prior to attaching or turning on the regulated 5V power supply, as the adapter cable does not provide any current limiting.