Wireless charging: what is it?

Wireless charging: what is it?

Even though wireless charging has been around for almost ten years, many mainstream consumers are unaware of its existence, or don't even know it exists. Here's what you need to know about wireless charging and why you might benefit from it.

What is wireless charging?

As the name suggests, wireless charging refers to any method of supplying power to a device that does not require a physical connection between the charger and the device being charged. Wireless charging often replaces cables, wall chargers, or other types of connectors to charge personal electronic accessories.

Is wireless charging a new concept?

Wireless charging first appeared in the consumer electronics industry in 2012, with some smartphone manufacturers such as Nokia and Samsung leading the implementation of the technology in their first smartphones. However, it took several years for an industry standard to emerge, after which trust grew among manufacturers and its implementation became widespread. Critical mass was arguably gained with Apple's inclusion of wireless charging in the iPhone 8 and iPhone 8 Plus in 2017.

How does wireless charging work?

Wireless charging uses electromagnetic induction to pass power from a transmitter (charger) to a receiver (smartphone or other device) via copper coils. This concept is similar to the technology used in induction cookers. The transmitting coil emits energy in the form of an alternating electromagnetic field. When the receiving coil is within this alternating electromagnetic field, movement is produced in the form of electromotive force, which in turn is converted into electrical current in the receiving coil and used to charge the battery.

What is the industry standard?

Qi (pronounced "chee") is the industry standard for wireless charging of portable electronics. Compatibility is guaranteed between Qi-certified products. The standard is overseen by the Wireless Power Consortium (WPC), a standards development group with more than 500 member companies.

What devices support wireless charging?

The main manufacturers that use the Qi standard are Apple, Samsung, Google, Sony and LG. Most current phones from these manufacturers support Qi wireless charging. Apple started supporting Qi wireless charging with the iPhone 8 and iPhone 8 Plus, and all subsequent iPhone models also support the standard. Additionally, Apple also uses the Qi standard for its wireless charging cases for AirPods and AirPods Pro.

Is wireless charging safe?

The Qi specification includes strict thermal regulation and design requirements to prevent damage to devices while charging. All Qi-certified devices dynamically adjust charging output to prevent excessive heat buildup and have built-in safety features to ensure charging current is only emitted when two compatible devices are placed close to each other. Also, the electromagnetic field created by a wireless charger does not pose any danger to people.

PWR Mobile wireless chargers are Qi certified and include our PWR-Coil module for faster, more reliable charging. Looking into the future and your comfort, the PWR Collection is designed to blend in with any room in your home or office. Take a look at our range of PWR Collection wireless chargers to find the one that fits your lifestyle.

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