Bloomberg Anywhere Remote Login Bloomberg Terminal Demo Request


Connecting decision makers to a dynamic network of information, people and ideas, Bloomberg quickly and accurately delivers business and financial information, news and insight around the world.


Financial Products

Enterprise Products


Customer Support

  • Americas

    +1 212 318 2000

  • Europe, Middle East, & Africa

    +44 20 7330 7500

  • Asia Pacific

    +65 6212 1000


Industry Products

Media Services

Follow Us

Bloomberg Customers

Wind up my Cell Phone, Please!

Posted by: Olga Kharif on April 25, 2005

We’ve all rewound toy chickens and mice when we were kids, which makes it a bit challenging to think of winding up as high-tech. Yet, one British company believes that turning the handle generates a legitimate type of alternative energy, along with solar and wind power. And the company, listed on the London Stock Exchange, plans to introduce a slew of chargers – for powering cell phones, boats and even cars — into the U.S. this year.

Called Freeplay Energy, the company just received a U.S. patent on its wind-up technology in April. The idea is pretty simple: As you wind away, your mechanical energy flows directly into a battery. The company, whose original investors include General Electric (GE) Pension Fund, claims it converts 74% of human energy into power – which is amazing, considering that, say, solar panels’ efficiency hovers around 30%. With Freeplay, if you turn the handle for 45 seconds, that gives you five minutes of cell phone talk time, says Rory Stear, the outfit’s CEO. I bet that a lot of people who’ve experienced the frustration of carrying around a dead phone will go this, even if we get laughed at, which is quite a possibility.

This technology for recharging phones, available since last year, is already a hit with wireless users in Africa, which is only 22% electrified, says Stear. The company is also working with humanitarian agencies and the United Nations to provide everything from self-powered flashlights to wind-up radios to developing nations.

And, this summer, Freeplay hopes to enter the U.S. in a big way. This August, the outfit will release a special foot pump converting mechanical energy into electricity. The device should be able to restart a boat or a car. And the company is testing the use of wind-up devices to power medical instruments, says Stear.

Seeing that Freeplay is profitable and expected to more than double its sales this year, copycats are, apparently, popping up left and right.

Now, I’ll look at a wind-up mouse with a newfound respect.

TrackBack URL for this entry:

Reader Comments


April 27, 2005 08:52 PM

I have been using a wind up flash light since Christmas and it works great.


July 30, 2005 12:16 PM

my brother's cell phone fell in the pool a few month ago. i want to know can it be saved? don't worry he has a new phone.


March 5, 2006 04:46 PM

How much energy can a hand held wind up crank produce? - As seen on the wind up flash lights and radios.

Post a comment



BusinessWeek writers Peter Burrows, Cliff Edwards, Olga Kharif, Aaron Ricadela, Douglas MacMillan, and Spencer Ante dig behind the headlines to analyze what’s really happening throughout the world of technology. One of the first mainstream media tech blogs, Tech Beat covers everything from tech bellwethers like Apple, Google, and Intel and emerging new leaders such as Facebook to new technologies, trends, and controversies.



BW Mall - Sponsored Links

Buy a link now!