Wireless charging: Please get here soon...and with a single standard

The day before I finished this Globe column about the prospects for wireless charging pads, I had one of those fun experiences where both my cell phone and laptop ran out of power while I was up in New Hampshire, and I'd stupidly left both chargers elsewhere. What's great about the concept of charging pads built into cars, hotel room desks, and airplane tray tables is that they'd let you charge devices without toting along their myriad power adapters. But the danger is that we might wind up with warring standards -- one charging pad might not juice a certain brand of phone, for instance.

Here's the gist of the column:

Wireless power transfer is the next new frontier for the consumer electronics industry, and unlike a 47.3 megapixel digital camera or a combination cellphone/pepper grinder, it's something that consumers actually want. And several years after companies like Splashpower Ltd. of Britain began demonstrating charging pads, big electronics companies are starting to show interest in helping bring the technology to market.

Watts by Air

Science News has a great piece about how an MIT team successfully transmitted electricity over the airwaves ... something people have been puzzling over since Nikola Tesla began exploring the problem early in the 20th century.

From the piece:

"What they've done is take some very basic physics concepts [and] brought these ingredients together. It's the synthesis which is the novel thing," says [John] Pendry [, a physicist at Imperial College in London].

Shanhui Fan, a physicist at Stanford University, says that the use of magnetic resonance as a means of transferring energy is a completely new concept, and "very clever." Although it's a simple principle, nobody seems to have thought of it before, he says. "Many great things look simple from hindsight."

[MIT prof Marin] Soljacic and his colleagues have applied for two patents, and they have branded their idea with the name WiTricity to suggest an electrical-power version of Wi-Fi wireless-Internet technology.

But if the physics is simple, why didn't anyone think of it sooner? Soljacic suggests that before the spread of cell phones and laptops, there was little need for a wirefree power source. In fact, Soljacic admits that what got him thinking hard about wireless power was the frustration of being awakened at night by a beeping cell phone that needed to be recharged.