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=====Qi standard=====

====What is Qi====

The Qi (pronounced chee) standard is a widely adopted wireless power transfer (WPT) technology designed for mobile devices. First introduced in **July 2010** with Version 1.0, Qi has since become the **leading global standard** for wireless charging. Developed by the **Wireless Power Consortium (WPC)** and supported by 285 companies, in particular major technology companies such as **Apple, Samsung, Google and Meta**, ensuring its continuous evolution and global adoption. Today, there are more than **11,000 Qi Certified products** on the market.
The Qi standard has been updated several times over the years to improve performance, compatibility, and efficiency:
  * Version 1.0 (July 2010)
  * Version 1.1 (March 2012)
  * Version 1.2 (October 2015)
  * Version 1.3 (January 2021)
  * Version 2.0 (April 2023)
  * Version 2.1 (September 2024)

====Key advantages====

All these previous improvements have significantly improved the performance and capabilities of Qi, resulting in several key advantages:
* Transmitter can deliver up to 15W
* Operating frequency of 360kHz
* Magnetic Power Profile (MPP)
* Foreign Object Detection (FOD)
* Universal compatibility
* Bidirectional communication

====Other WPT technologies====

Other WPT technologies include the AirFuel Alliance standard (formerly Power Matters Allicance) and its magnetic resonance-based approach. While these alternatives offer benefits such as longer-range charging, the Qi standard remains the most widely adopted due to its efficiency, compatibility and strong industry support.

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<color #808080>**References**</color>
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