How to have power without wire? Wireless Power

A lot of things has gone wireless.

We have phone going wireless - which is mobile phone nowadays.
We have internet service going wireless - and becomes WIFI, 3G, WiMax now.
We have speaker going wireless - Wireless Headphone.
We have game console going wireless - Wii.
We have scanner going wireless - RFID.
We have memory card going wireless - Eye-Fi.
We even have BOOKS going wireless !! - Amazon Kindle.

Now can we have power going wireless? Imagine if we can have power without wire.

• Your computer table doesn't need to have clutter of wire.
• You no need to install extension power plug anywhere in your house.
  
• You no need to plug in your mobile phone to recharge battery, you can put anywhere and it can be recharged once enter the wireless power zone.
  
• Your laptop is not going to run out of power since it can recharge when enter the wireless power zone.

Isn't it perfect? I believe it will not be long before we can have wireless power. Look at the following diagram. The power is transfered wirelessly and go through a wall to the other side to light up a bulb. Explanation as below.

1. Resonant copper coil attached to frequency converter and plugged into outlet
2. Wall outlet
3. Obstacle
4. Resonant copper coil attached to light bulb

Scientist is experimenting with magnetic resonance coupling to power a 60-watt light bulb. When the frequency is tuned to the same frequency, two 60-centimeter copper coils can transmit electricity over a distance of two meters, through the air and around an obstacle. Though the efficiency is only around 50% now, but they are looking to boost the efficiency up to 70% ~ 80%.

Wireless power zone:

Some applications available - wireless desktop charger:



More information at
How Stuff Works: How wireless power works
Wikipedia: Wireless Power