Charging Cell phone battery... Wirelessly!!!

Imagine a situation... You are in the Express train, and your cell phone runs out of juice. You normally would set to find the Charging terminal in the train. But to my experience on years of traveling in the train, most of the charging points are "screwed up" and unusable. You then hop from bogie to bogie in search of a "perfect point". Finally, if luck is in your favor your phone gets refueld else you end up wondering how all the passengers seem to have chosen the very time to charge their cell when your cell is out cold?

There are many times in our lives when the cell phone is indicating low battery and we are desperately seeking a way to get the cell phone charged like a thirsty fella searching for a glass of water...

Very soon the "finding a charging point" would be a thing of the past. Enter the world of Wireless Charging.In near future you may just have to enable your bluetooth and pair it up with the "Recharger" Bluetooth. You Cell phone will be then ready to rock the world! That's quite like the stunt taken out from Sci-Fi Movie, you'll say! Well no...

The idea of wireless power transmission is not new. In 1899, Nikola Tesla wirelessly transmitted 100 million volts of electricity 26 miles to light 200 bulbs and run an electric motor. However, at that time direct current (DC, which is the wired method) and alternating current (AC) were competing technologies. DC, backed strenuously by Thomas Edison, emerged the winner.

But how does the Wireless charging work? For that we'll have to learn the technical basics.

Lets get Technical!!!
Wireless charging is any of several methods of charging batteries without the use of cables or device-specific AC adaptors. Wireless charging can be used for a wide variety of devices including cell phones, laptop computers and MP3 players as well as larger objects, such as electric cars. There are three methods of wireless charging: inductive charging, radio charging and resonance charging.

Inductive charging is used for charging mid-sized items such as cell phones, MP3 players and PDAs.
In inductive charging, an adapter equipped with contact points is attached to the device's back plate. When the device requires a charge, it is placed on a conductive charging pad, which is plugged into a socket.

Radio charging is used for charging items with small batteries and low power requirements, such as watches, hearing aids, medical implants, cell phones, MP3 players and wireless keyboard and mice. Radio waves are already in use to transmit and receive cellular telephone, television, radio and Wi-Fi signals. Wireless radio charging works similarly. A transmitter, plugged into a socket, generates radio waves. When the receiver attached to the device is set to the same frequency as the transmitter, it will charge the device's battery.

Resonance charging is used for items that require large amounts of power, such as an electric car, robot, vacuum cleaner or laptop computer. In resonance charging, a copper coil attached to a power source is the sending unit. Another coil, attached to the device to be charged, is the receiver. Both coils are tuned to the same electromagnetic frequency, which makes it possible for energy to be transferred from one to the other.The method works over short distances (3-5 meters).

At least my mom will be pleased to know this as she dislike the wires dangling from the electric point. Also the wires add pretty decently to the clutter on the desk.

Enjoy the freedom of Clutter Free life!