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Wireless Charging Technology – Past, Present & Future

Wireless charging is a technological innovation that’s been around since 1981. In the past one year, smartphone skills have progressed with tremendous functions and leaders like Qualcomm, Nokia, HTC & Samsung are contributing to large smartphone sales. In fact, wireless charging is already being used as a facility in the Lumia 820/920. Even Samsung Galaxy S IV will appear with wireless charging option & Nexus 4, accompanied by wireless Orb. It is, naturally, predicted to become a conventional feature on mobile phones. However, there are some difficulties to overcome before that happens. So, if you have been hearing a lot about wireless charging, don’t get confused as we have got wireless terms, definitions, advantages, disadvantages, threats & opportunities discussed below.

Wireless Charging Technology


Wireless charging means offering energy to a system through the air, to charge it. There is no need for a wire that joins product & charger.

Working Method

Wireless or Inductive charging works in the form of energy transfer between two gadgets using electro-magnetic area. An AC existing in one aspect (transmitter coil) conceives an attractive position which will produce a current and transmit it in the second aspect (receiver coil), which will have current lasting abilities in a system without any cable linking the two of them. All you need to do is place the equipment near/on the plate meant for charging. The coils, at the same time, will form a transformer.


  • No chance of an electrically operated shock
  • No messing with wires/cords
  • Decreased use and rip-off


  • Less effective
  • Extra cost
  • Restricted action

Industry Standards

Apparently, the long range opportunities are several. Rather than devoted charging, it would be great to just place our device or any other system on a boardroom desk or a bedroom desk which will instantly start charging. While referring to linked charging, we have two conventional standards in the form of a micro USB or simply a USB. This doesn’t seem to be the situation in wireless charging where we have got two wireless standards from two different industry leaders in place –alliance for WI-Fi power (A4WP) and QI (Chee).

Alliance for WI-FI Power (A4WP)

Collaborative initiatives of Samsung & Qualcomm led to the formation of an alliance for WI-FI Power or A4WP, an opponent to the QI conventional. This convention is trying to carry spatial versatility, which indicates charging several equipments on any given position simultaneously. This involves an energy shift via non-metallic (furniture) and other external surfaces. A4WP concentrates on enhancements like important spatial versatility between wireless gadgets and the resources of wireless charging, which indicates energy shift via non-metallic external source. Essentially, they wish to eliminate things like panels, mats, covers, cases and so on. For example, Qualcomm is working on a technology known as WiPower, which allows charging of many gadgets like a game controller, camera, phones, and more by placing them in a position. Furthermore, it has developed another technology in the form of Halo which is a vehicle used for electric charging in a wireless manner. This technology uses inductive wireless energy exchange to reinstate the power of an electric vehicle by eliminating the need for the plug-in cable.

Qi (pronounced ‘chi’)

Qi is a convention progressed by Wireless Power Consortium consisting of all the Smartphone giants like Sony, Samsung, Motorola, LG, Huawei, HTC, Nokia & many more. Nokia is among the first companies to demonstrate wireless charging using the Qi convention with its newest Lumia mobile phones accompanied with a number of components such as the wireless plate for charging and a wireless stand. QI performs on inductive charging and will work only for those equipments  that lie within the scope of this convention. In this type, there happens to be foundation in place that provides the energy with the help of a coil and the device using it on the receiver end. The area between these two rings is usually 5mm and can be probably prolonged to about 40mm. QI in the past had a low-power transmission that provided up to 5 watts and then shifted to medium-power transmission that can deliver 120 watts.


While Nokia equipment established in the Qi convention has begun to conquer the shops, Qualcomm’s A4WP-based equipment with “spatial flexibility” will be seen somewhere around 2015. Though we are at a novice level of wireless charging, the technology seems a challenge and could also become a conventional attribute in the next three to four years.

Author Bio:- The author works as a web designer at 337design, the leading website design and development company based in Los Angeles. A skilled and experienced team helps the company to build an array of professional and creative websites.

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