When I started flying in 1994, there certainly wasn't the need for accessory power in the cabin. These days it's an entirely different story and the number of portable devices I carry grows by the month. Who thought you would have to charge your sunglasses? That's why the market is being bombarded with panel USB charging ports. These are generally FAA-certified devices that mount either on the instrument panel or in interior components, and connect with the aircraft's electrical bus for voltage.