It's been called both "vampire power" and "phantom load" -- likened to the power-hungry HAL 9000 computer (at left) in Stanley Kubrick's classic film 2001: A Space Odyssey.

It's the little unblinking red light on the television set that is silently drawing energy from the grid; studies have shown it can add 10% or more to a household energy bill.

Now Spanish entrepreneurs claim to have invented a way to end the problem that has bedeviled energy regulators, environmentalists and appliance manufacturers. They have patented an algorithm that can detect when an appliance is in standby mode and automatically switch it off completely.

The standby-mode killer has yet to be proven commercially and must contend with other new products designed to tackle the same problem. But, despite some doubters, the Spanish inventors say theirs is the only product able to completely do away with a large, and growing, world-wide problem.

Now how about that!

Get more at the Wall Street Journal.