The latest generation of home gaming consoles uses so much power that the consoles may end up costing American consumers $1 billion dollars in electricity a year, according to a new report by a New York environmental group. Forty percent of that power — a whopping $400 million a year — may be consumed by consoles not being actively used, but instead left in standby mode. The Xbox Ones dubious distinction is a result of its always-on standby mode, which is constantly listening for gamers voice commands.