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Many of the electrical products has gone wireless. Now there's wireless charging. 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. There are three methods of wireless charging : inductive charging, radio charging and resonance charging.
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).