Wireless charging has become the norm for many smartphone users, but the term “wireless charging” is more complex than you might think. More specifically, Qi charging is actually a wireless charging standard adopted by most modern devices; if both the charger and the phone support Qi, the power transfer and safety protocols are the same as those for standard wireless charging.
What is the difference between Qi and standard wireless charging?
The key difference is that Qi wireless charging is a certified and standardized system that delivers consistent performance and includes built-in foreign object detection to prevent devices from overheating. Qi charging also ensures that devices from different brands can use the same charging pad, thanks to interoperability and safety requirements that protect both the phone and the charger during the charging process.
In contrast, “standard wireless charging” is a broader term that refers to inductive power transfer without the need for cables. Typically, standard charging options do not have formal certification or guarantees of interoperability, which means they may lack built-in safety features. If you want to know whether your wireless charger is Qi-certified, look for the Qi logo on the device or check the brand’s official website. To determine if your phone is Qi-compatible, you’ll need a case that works with a wireless charger, and you should consult your phone’s user manual or the brand’s official website for detailed information.
Wireless charging was once merely an experimental technology, but the Qi standard marked a major turning point in 2008. Developed by the Wireless Power Consortium, the Qi standard aimed to create a universal inductive charging method. This was a significant advancement at the time, as many electronic devices were limited to proprietary applications and lacked cross-brand compatibility. Qi quickly became the standard for smartphones and other devices because it offered a faster and safer method of wireless charging.
However, in addition to Qi, there are other wireless charging standards. For example, Powermat (also known as PMA) is an inductive charging standard that differs from Qi. This makes Powermat technology incompatible with Qi chargers. Although Powermat is used in some public charging stations, it is not as widespread as Qi technology, which dominates the consumer electronics market. Powermat technology later became part of the AirFuel Alliance, a global consortium of digital wireless companies.
Charging technology has advanced to the point where true wireless power is now achievable, and “invisible” charging has become a reality. This charging method actually works through surfaces such as wood, plastic, or glass, with the charging device hidden beneath the surface. When a device in need of charging is placed on the surface, power is transmitted from the charger through the tabletop to the device. Overall, invisible charging uses the same technology as Qi, but is more advanced.
Source: KOCPC Chinese