Wall warts, power bricks, and little black boxes are about to become more energy efficient
As of this month, the little black boxes attached to many small electronic devices will cost less to run due to Department of Energy (DOE) standards that will reduce the amount of energy they waste. Though the energy use per unit is small, the combined energy use from the more than 1 BILLION external power supplies (EPSs) in use in the United States adds up.
