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An emerging technology that is being adopted heavily by wireless chargers is inductive charging. This wireless transmission technique uses a magnetic field to transfer electricity, allowing compatible devices to receive power through this current, rather than utilizing conductive wires and cords. In this article, we’ll dive a little deeper into the technology behind this technique and the various components thereof.

What is Inductive Charging?

Inductive charging is a method by which a magnetic field transfers electricity from an external source (the charger) to a mobile device (your phone, PSP, etc.) without the use of standard wiring. It does this by generating a magnetic field and creating a current in the receiving device. With the compatible receiver attached to your device – in the form of a clip, case or sleeve – electricity can move through the air and recharge your device’s battery.

Unlike traditional electrical transfer, electrodynamic induction does not require contact points. This means that as long as your device is near to the source of the magnetic field, it will receive power. You won’t have to worry if your device falls to one side or the connection is obstructed by dust—your device will continue to receive power.

Why Do I Need a Special Case for my Phone/Device?

A reasonable question! These cases/clips/sleeves are needed because they receive and transmit the electricity that travels through the magnetic field. Without the built-in receivers in these cases, no charge would pass to your device. The cases keep the receiver close to the source of the magnetic field, maintaining the transfer of electricity. Wiring in the case reroutes the power from the receiver to the battery through the existing port used for charging; the further the receiver is from the field generator, the weaker the received current is.

What Advantages Does This Have Over Contact-Point Wireless Charging?

Inductive chargers, as mentioned above, create a magnetic field that transfers electricity through the air. Contact-point chargers require constant, uninterrupted contact to maintain a charge. Much like standard electric outlets, the metal must remain in contact at all times to maintain the flow of electricity, so if the prongs are loose, you may not get the power you need. These contact-point chargers essentially move the standard contact points (accessed by the cable) from their current location to the back of the device. Inductive chargers don’t have to maintain this contact to keep the current flowing.


Now that you know the differences between inductive transfer technology and contact-point wireless chargers, you can make an informed decision about the product you’re looking to buy. Be sure to check out our comparison of the best wireless chargers to find the one for you; you will be charging your mobile devices with drop-and-go ease in no time.


This article was previously published at


Comments on: "Technology at work: Wireless Chargers" (2)

  1. Whoever gets these chargers will be a multi-millionaire! Don’t you think? 😉

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