Rezence (wireless charging standard)

Rezence

Official Rezence logo, representing the wireless charging standard and the Alliance for Wireless Power (A4WP)

First published| 2012; 11 years ago (2012)
Organization| Alliance for Wireless Power
License| Open standard
Copyright| Logo and trademark
Website| https://www.rezence.com/

Official Rezence brandmark, the A4WP uses this mark of interoperability to show that various devices are compatible with Rezence systems.

Rezence (pronounced reh-zense) is an interface standard developed by the Alliance for Wireless Power (A4WP) for wireless electrical power transfer based on the principles of magnetic resonance. The Rezence system consists of a single power transmitter unit (PTU) and one or more power receiver units (PRUs). The interface standard supports power transfer up to 50 watts,[1] at distances up to 5 centimeters.[2] The power transmission frequency is 6.78 MHz, and up to eight devices can be powered from a single PTU depending on transmitter and receiver geometry and power levels. A Bluetooth Low Energy link is defined in the A4WP system intended for control of power levels, identification of valid loads and protection of non-compliant devices.[3][4]

The A4WP was formed in early 2012 with the intent to create a wireless power transfer standard to compete with the existing Qi standard. Board member companies[5] include Broadcom, Gill Electronics, Integrated Device Technology (IDT),[6] Intel,[7][8] Qualcomm, Samsung Electronics,[9] Samsung Electro-Mechanics, and WiTricity.[10]

[11]

## See also

* Cordless
* WiPower
* Contactless energy transfer
* Inductive coupling
* Near field communication
* Bluetooth Smart
* Open Dots, a conductive charging standard promoted by Open Dots Alliance

## References

1. ↑ "Alliance for Wireless Power (A4WP) Announces the Expansion of the Rezence™ Standard to 50 Watts to Include Tablets, PCs and Peripherals". MarketWatch. PR Newswire. http://www.marketwatch.com/story/alliance-for-wireless-power-a4wp-announces-the-expansion-of-the-rezence-standard-to-50-watts-to-include-tablets-pcs-and-peripherals-2014-06-04.
2. ↑ "A4WP Rezence Wireless Power". https://www.youtube.com/watch?v=oseV55j1g3w.
3. ↑ "Rezence Technical Specification". http://www.rezence.com/technology/technical-specification.
4. ↑ "Bluetooth Based Wireless Charging – Rezence (A4WP)". http://www.wirelessoutlook.com/technology/bluetooth-based-wireless-charging-rezence-a4wp/.
5. ↑ "A4WP Board Members". http://www.rezence.com/alliance/board-of-directors.
6. ↑ "IDT Joins the Alliance for Wireless Power to Assist in Propagation of Innovative Wireless Power Solutions". http://www.idt.com/about/press-room/idt-joins-alliance-wireless-power-assist-propagation-innovative-wireless-power-solutions.
7. ↑ "Intel joins Alliance for Wireless Power's Board of Directors". https://www.engadget.com/2013/06/19/intel-joins-a4wp/.
8. ↑ "Intel joins A4WP, a newcomer to wireless power standards". http://www.cnet.com/news/intel-joins-a4wp-a-newcomer-to-wireless-power-standards/.
9. ↑ "Samsung, Qualcomm start up Alliance for Wireless Power to take on Qi". https://www.engadget.com/2012/05/08/samsung-qualcomm-start-alliance-for-wireless-power/.
10. ↑ "WiTricity Joins Alliance for Wireless Power (A4WP)". https://finance.yahoo.com/news/witricity-joins-alliance-wireless-power-131500954.html.
11. ↑ "Winergy Wireless Charger Reviews 2022: Exclusive Report". https://reviewecstasy.com/winergy-wireless-charger/.

## External links

* – official site
* Bluetooth Smart – official site of Bluetooth Smart technology

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