Invisible power

By Chris Taylor

Marin Soljacic couldn't sleep. The problem was his wife's Nokia cell phone. The tyrannical device beeped on the bedside table when it needed to be plugged in. It could not be disabled.

Instead of taking a hammer to the phone, Soljacic marveled at the fact that this device, and billions of others like it, was sitting a few feet away from all the electricity it could ever need. Why couldn't it receive power wirelessly, just as laptops get Wi-Fi?

Being a physics professor, not an electrical engineer, Soljacic didn't know the history of failed attempts to produce wireless electricity. (Thomas Edison and his rival Nikola Tesla were among the first to envision long-distance power-beaming.) Soljacic also didn't pause to consider conduction, the kind of close-range charging used in electric toothbrushes, which is about as far as wireless electricity got before him.

Soljacic learned that if you could get two magnetic fields to resonate -- to sing the same note, in effect -- they could transfer an electric current. With two large magnetic coils, he found in an experiment described in Science magazine in 2007, you can throw 60 watts across a room, powering a lightbulb. (Keeping the two resonators in perfect harmony over a distance is not simple; Soljacic spent several years running lab experiments before he built a system that worked reliably.)

MIT, his employer, quickly patented the technology (Soljacic's name is on the patent) and encouraged Soljacic to start a company. He would sit on the board but find executives to run it full time. The result can be found on the second floor of a brick building in Cambridge, Mass. leased to the company by the big-and-tall tailor on the ground level.

WiTricity's 15 employees are hard at work proving that Soljacic's magnetic coils can power almost any electrical device. David Schatz, director of business development, shows me a TV, a DVD player and a computer, all of them wireless.

"This was our No. 1 request from business users," Schatz says, switching on a projector. "Look: no batteries, no wires, nothing up my sleeve." The coil sending out the power is hidden behind an abstract painting that the CEO's wife rescued from their basement.

Schatz is the first to admit that the housing they've hurriedly built for the receiving coils is too bulky. "No one would want to buy this," he says, pointing to the pack that juts out from the back of the laptop, a pregnant plastic bulge that's about a third as large as the device itself.

Given sufficient cooperation from equipment manufacturers, WiTricity is confident that it can incorporate its coil into the guts of any device. (Think of how computermakers like Apple (AAPL, Fortune 500) turned bulky Webcams into fingernail-size lenses that fit in a thin laptop case.) CEO Eric Giler, a veteran tech executive who ran a telecom company for 22 years, understands the importance of letting potential partners play with patented technology.

So far about a dozen companies -- including Intel (INTC, Fortune 500) and Sony (SNE) -- have tried replicating Soljacic's groundbreaking MIT experiment in their own research facilities, just to make sure it's the real deal. That might make other CEOs nervous, but not Giler.

"Our best customers are going to be the guys who try to do this," he says, "because it is really hard." The company is also talking to furniture manufacturers about fitting coils into desks and cubicle walls. The first announcement of a WiTricity partner product is expected toward the end of 2010.

Most of Giler's potential customers have one major question: safety. "There's a real perceptual problem," he says. "People think we're putting electricity in the air, and that's called lightning, and they know to stay away from that."

In fact, the coils turn electricity into magnetic fields, then back into electricity. And as any physicist will tell you, magnetic fields interact weakly with humans; as far as the fields are concerned, we are no different from air. (The Earth itself exudes a magnetic field.)

Initially, Giler was skeptical. Magnetism from MRI machines can disable pacemakers. Wouldn't wireless electricity pose similar risks? Soljacic replied that MRI magnetism is about 10,000 times stronger than his version. The Institute of Physics in London concurs: WiTricity's magnetic field "has no detrimental effects on the human body."

Giler makes a point of standing between the coils whenever he demonstrates the technology. At the Nikkei electronics conference in Tokyo in October, he was able to power a 1,000-watt klieg light from across the room -- a far cry from that 60-watt lightbulb in Soljacic's first experiment. "We're going up the power curve," he says.

WiTricity's record so far is 3,000 watts -- enough to fully charge an electric car, so long as it's in the same room (or garage). How big could WiTricity get? "Every single person in the world can relate to the problem of running out of batteries or having wires everywhere," Giler says. "The market is so potentially huge that numbers become meaningless."

A wireless electric world could free up designers to create entirely new kinds of products, no longer hemmed in by the need for boxy batteries or power supplies. As one of Giler's VC investors says, "I bet you that's your bestseller in five years' time. You don't even know what it is yet."

Questions & Answers

QHow does a florist sell more in this economy? We changed our business to designing weddings and events only, as the everyday flowers are not selling. We had to throw out too much product at the end of the week -- flowers are perishable! More
Get Answer
- The Flower Lady, Suwanee, Ga.
Just the hot list include
Frontline troops push for solar energy
The U.S. Marines are testing renewable energy technologies like solar to reduce costs and casualties associated with fossil fuels. Play
25 Best Places to find rich singles
Looking for Mr. or Ms. Moneybags? Hunt down the perfect mate in these wealthy cities, which are brimming with unattached professionals. More
Fun festivals: Twins to mustard to pirates!
You'll see double in Twinsburg, Ohio, and Ketchup lovers should beware in Middleton, WI. Here's some of the best and strangest town festivals. Play
Index Last Change % Change
Dow 32,627.97 -234.33 -0.71%
Nasdaq 13,215.24 99.07 0.76%
S&P 500 3,913.10 -2.36 -0.06%
Treasuries 1.73 0.00 0.12%
Data as of 6:29am ET
Company Price Change % Change
Ford Motor Co 8.29 0.05 0.61%
Advanced Micro Devic... 54.59 0.70 1.30%
Cisco Systems Inc 47.49 -2.44 -4.89%
General Electric Co 13.00 -0.16 -1.22%
Kraft Heinz Co 27.84 -2.20 -7.32%
Data as of 2:44pm ET


Bankrupt toy retailer tells bankruptcy court it is looking at possibly reviving the Toys 'R' Us and Babies 'R' Us brands. More

Land O'Lakes CEO Beth Ford charts her career path, from her first job to becoming the first openly gay CEO at a Fortune 500 company in an interview with CNN's Boss Files. More

Most stock quote data provided by BATS. Market indices are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer. Morningstar: © 2018 Morningstar, Inc. All Rights Reserved. Factset: FactSet Research Systems Inc. 2018. All rights reserved. Chicago Mercantile Association: Certain market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. Dow Jones: The Dow Jones branded indices are proprietary to and are calculated, distributed and marketed by DJI Opco, a subsidiary of S&P Dow Jones Indices LLC and have been licensed for use to S&P Opco, LLC and CNN. Standard & Poor's and S&P are registered trademarks of Standard & Poor's Financial Services LLC and Dow Jones is a registered trademark of Dow Jones Trademark Holdings LLC. All content of the Dow Jones branded indices © S&P Dow Jones Indices LLC 2018 and/or its affiliates.