could it be possible?











sorry so short... very tired.

rather curious

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No it wouldn't.







Need something for the electricity to flow through.





If it goes through the air...


Then you just invented a Tesla Coil.

Yes. They're called batteries.

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Microwave Power Transmission: "Microwave power transmission (MPT) is the use of microwaves to transmit power through outer space or the atmosphere without the need for wires."

Following the next link (Wireless energy transfer) at that link, "Except for RFID tags, wireless power transmission over room-sized or community-sized distances has not been widely implemented. Rightly or not, it has been assumed by some that any system for broadcasting energy to power electrical devices will have negative health implications. With focused beams of microwave radiation there are definite health and safety risks. Considering the hazards associated with powerful radiation, the physical alignment and targeting of devices to receive the energy beam is of particular concern. However, with the use of resonant coupling, wavelengths produced are longer, making it no more dangerous than being exposed to radio waves."

i remember one episode of Voltron where the giant robot was knocked out on some distant planet, and all the people were knocked out. the power was almost down to zero... things were pretty bleak.
so, to rescue them, the old guy back at the castle sent them some energy via microwaves, and Voltron was able to get off the planet before it blew up or whatever.
so, yes, it must be possible.

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The short answer is yes.

Over short distances, using RF energy to transmit small amounts of power is possible. At least one company is apparently close to commercializing it, and other approaches are being experimented with.

Over really short distances we've had inductive wireless power for a while now, with many applications like phone and toothbrush chargers.

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RFID. RF energy remotely powering otherwise unpowered chips. Some retailers (such as Walmart) use it for inventory tracking. You'll see them as 1"x1" stickers on the inside of DVD cases you buy from them. You'll find them on other products as well.

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- Moose's one-line review.

"your going to regret that one. You are now a colonoscope...
- Chrissy, corrupting PraedSt's wish.

Put solar cells on it. Have light that tracks the object and shines light on it.

That's even less efficient that microwave transmission-- 12% versus something like 50% in Earth's atmosphere.

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If you were to set up a very tight microwave beam you should be able to get over 80% efficiency from your transmitter to your household device. But as a practical matter, solar cells will often be more useful than microwave energy on account of how light is fairly common phenomena. However, people should note that indoor light is often only about 1,000th as intense as full sunshine.

microwaves are high energy light waves, so it isn't really all that inconceivable to make solar cells that make energy from microwaves.

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One of three mentioned in this PopSci article (from last months issue).
I would guess thats the source of the OP.

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Tesla beamed power over distances back in the 1800s.

MIT beamed microwave power across the desert back in the '80s to test out the concept of solar power stations in orbit.

Nothing new...

what about, in the future you have small robotic bees, that fly around delivering packages of power to devices?

it could work.

I'm holding out for a Robotic Richard Simmons.

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In Fallout 3, 'happiness' is a warm junkyard dog and a loaded gun. It's mostly the loaded gun.
- Moose's one-line review.

"your going to regret that one. You are now a colonoscope...
- Chrissy, corrupting PraedSt's wish.

Is a cordless extension cord possible? I'd have to say no, simply because if it is indeed cordless, I don't see how it can also be a cord...

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I still say no.

Most of the responses deal with microwave transmissions- which are weak at best and lethal if you want to use a power tool.

Batteries are not what jonathan had in mind I am sure.

There has been talk of using lasers to beam power through space but, as an extension cord? The point of an extension cord or battery operated tool is mobility. You can move around with it. Climb a ladder... etc. Now if you are beaming power to a unit- doesn't it need to stay in place otherwise it hops out of line of sight and loses power?

Infuse the air with fuel, draw it into the device and burn it to provide power.

You may want to have some system where the fuel only ignites in the presence of a reusable catalyst within the device for, you know, safety reasons. For example, the fuel could be popcorn and the the device could be powered by respiration.

The theory works in ranges other than microwaves, too. One of my favorite CB antennas had an internal coil with about a 2 square inch footprint. The external antenna wasn't directly connected, but the radiated power went through the window glass.

Earlier car phones (before cell phones became popular) did much the same thing.

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