{{Short description|Open standard for inductive charging developed by the Wireless Power Consortium}} {{Multiple issues| {{Update|date=August 2021}} {{more citations needed|date=August 2021}} {{Overly detailed|details=Please see the talk page|date=December 2024}} }} {{Infobox technology standard | title = Qi | image = Wireless Power Consortium logo.svg{{!}}class=skin-invert-image | image_size = 135 | alt = The Qi logo, which consists of a round-esque, lowercase "q" with a semicircle at the right parallel to its stem and a circle on top. | caption = | status = Active | first_published = {{start date and age|2010}} | version = 2.2.1 | version_date = {{start date and age|2025|July}} | organization = Wireless Power Consortium | domain = Inductive charging | related_standards = Ki (Cordless Kitchen) standard<br /> Medium Power standard | license = Latest version and test specs: Proprietary.<br /> Previous versions: Open standard | copyright = Logo and trademark | website = {{URL|chargewithqi.com}} }} '''Qi''' ({{IPAc-en|tʃ|iː}} {{respell|CHEE}}) is an open standard for inductive charging developed by the Wireless Power Consortium. It allows compatible devices, such as smartphones, to receive power when placed on a Qi charger, which can be effective over distances up to 4 cm (1.6 in).<ref name="Intro">{{cite web |title=An introduction to the Wireless Power Consortium standard and TI's compliant solutions |publisher=Ti |url=http://www.ti.com/lit/an/slyt401/slyt401.pdf |url-status=dead |archive-url=https://web.archive.org/web/20150529010246/http://www.ti.com/lit/an/slyt401/slyt401.pdf |archive-date=2015-05-29}}</ref> Devices that implement the optional Magnetic Power Profile, based on Apple's MagSafe wireless charging technology, using magnets for better device attachment and alignment to a charger may be labelled Qi2.<ref>{{Cite web |title=Qi Wireless Charging |url=https://www.wirelesspowerconsortium.com/standards/qi-wireless-charging/ |access-date=2025-01-08}}</ref>
Qi version 1.0 was released in 2010; by 2017, it had been incorporated into more than 200 models of smartphones, tablets, and other devices.<ref>{{cite web |title=Qi enabled Phones / Qi compatible Devices |url=http://qi-wireless-charging.net/qi-enabled-phones/ |access-date=September 27, 2017 |website=Qi Wireless Charging}}</ref> In December 2023, 351 manufacturers were working with the standard, including Apple, Asus, Google, Huawei, LG Electronics, Samsung, Xiaomi, and Sony.<ref>{{cite web |publisher=Wireless Power Consortium |title=Member Directory |url=https://www.wirelesspowerconsortium.com/member-directory/ |access-date=5 December 2023}}</ref> The Qi specification version 2.2, released in April 2025, supports charging speeds of up to 25 watts and aims to improve compatibility across devices from various manufacturers.<ref>{{Cite magazine |last=Anker |date=2025-07-21 |title=Qi 2.2 Wireless Charging: What You Should Know |url=https://www.anker.com/blogs/chargers/qi-2-2-wireless-charging |access-date=2025-07-22 |magazine=Anker |language=en-US |issn=1059-1028}}</ref><ref>{{Cite web |title=History of the Qi Specifications |url=https://www.wirelesspowerconsortium.com/knowledge-base/specifications/history-of-the-qi-specifications/ |access-date=2025-04-03 |website=Wireless Power Consortium |language=en}}</ref> The current version 2.2.1 released in July 2025 includes Qi2 25W branding for the 25 watt charging mode.<ref>{{Cite web | title=Archived copy | url=https://www.wirelesspowerconsortium.com/media/wvsmia32/qi2-25w-news-release-v72.pdf | archive-url=https://web.archive.org/web/20250723163613/https://www.wirelesspowerconsortium.com/media/wvsmia32/qi2-25w-news-release-v72.pdf | archive-date=2025-07-23}}</ref>
== Naming == The name of the Qi standard comes from the Chinese word ''qì'' ({{Lang-zh|s=气|t=氣|links=no}}), meaning "life force" or "vital energy".<ref>{{Cite web |title=About Qi |url=https://www.chargewithqi.com/about-qi/ |website=Qi |publisher=Wireless Power Consortium |access-date=2025-01-08}}</ref><ref>{{Cite web |title=Qi wireless charging |url=https://www.pcmag.com/encyclopedia/term/qi-wireless-charging |access-date=2026-04-22 |website=PCMag Encyclopedia}}</ref>
== Design == thumb|left|Fig. 1-1 Devices that operate using the Qi standard rely on electromagnetic induction between planar coils. A Qi system consists of two types of devices – the Base Station, which is connected to a power source and provides inductive power, and Mobile Devices, which consume inductive power. The Base Station contains a power transmitter that comprises a transmitting coil that generates an oscillating magnetic field; the Mobile Device contains a power receiver holding a receiving coil. The magnetic field induces an alternating current in the receiving coil by Faraday's law of induction. Close spacing of the two coils ensures the inductive power transfer is efficient.{{citation needed|date=August 2021}}
Base Stations typically have a flat surface – referred to as the Interface Surface – on top of which a user can place one or more Mobile Devices. There are two methods for aligning the transmitting coil (part of the Base Station) and receiving coil (part of the Mobile Device) in order for a power transfer to happen. In the first concept – called guided positioning – a user must place the Mobile Device on a certain location of the Base Station's surface. For this purpose, the Mobile Device provides an alignment aid that is appropriate to its size, shape, and function. The second concept – referred to as free positioning – does not require the user to place the Mobile Device in direct alignment with the transmitting coil. There are several ways to achieve free positioning. In one example a bundle of transmitting coils is used to generate a magnetic field at the location of the receiving coil only. Another example uses mechanical means to move a single transmitting coil underneath the receiving coil. A third option is to use a technique called ''Multiple Cooperative Flux Generators''.<ref>{{cite web |title=Variable Position Wireless Power Transmitter through Multiple Cooperative Flux Generators |url=http://www.wirelesspowerconsortium.com/technology/multiple-cooperative-flux-generators.html }}{{Dead link|date=July 2025 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
The power transmitter includes a power conversion unit and a communications and control unit. Figure 1-1 shows the transmitting coil (array) generating the magnetic field as part of the power conversion unit. The control and communications unit regulates the transferred power to the level that the power receiver requests. A Base Station may contain numerous transmitters, allowing for multiple Mobile Devices to be placed on the same Base Station to charge each of its batteries.{{citation needed|date=August 2021}}
A power receiver comprises a power pick-up unit, and a communications and control unit. A power pick-up unit typically contains a single receiving coil only. The mobile device it charges typically contains a single power receiver. The communications and control unit regulates the transferred power to the level that is appropriate for the device.{{citation needed|date=August 2021}}
=== Transmitters === A reference Qi low-power transmitter has a coil of 20 turns (in two layers) in a flat coil, wound on a form with a 19 mm inner diameter and a 40 mm outer diameter, with a below-coil shield of soft iron at least 4 mm larger in diameter which gives an inductance of 24 ± 1 microhenries. This coil is placed in a series resonant circuit which is driven by an H-bridge switching arrangement from the DC source. Power control is automatic and voltage is controllable in steps of 50 millivolts or less.{{citation needed|date=August 2021}}
In the device a proportional-integral-derivative controller is used to modulate the delivered power according to the primary cell voltage.{{citation needed|date=August 2021}}
Other Qi charge transmitters start their connections at 140 kHz, but can adjust to find a frequency to better match the distance between coils. Different Qi reference designs have different coil arrangements, including oval coil and multi-coil systems as well as more complex resonance networks with multiple inductors and capacitors. These designs allow operation at frequencies from 105 to 205 kHz and with maximum resonant circuit voltages as high as 200 volts.{{citation needed|date=August 2021}}
=== Receivers === The Qi power receiver hardware reference design starts with a rectangular coil of wire 44 mm × 30 mm outside size, with 14 turns of wire, and with an above-coil magnetic shield.{{citation needed|date=August 2021}} Power output to the portable device is via a full-wave bridge; the power is typically filtered with a capacitor before delivery to the charge controller.{{citation needed|date=August 2021}} Other Qi power receivers use alternate resonance modulators, including switching a resistor or pair of resistors across the receiver resonator capacitor, both before and after the bridge rectifier.{{citation needed|date=August 2021}}
== Features and specifications == [[File:LG WCP-300 Qi wireless charger.jpg|thumb|left|The bottom side of an LG WCP-300 Qi charging pad]] thumb|Opened Nokia DT-900 Qi charger The Wireless Power Consortium (WPC) published the Qi low-power specification in August 2009.<ref>{{Cite news |url=https://www.ecnmag.com/article/2009/09/wireless-power-consortium-releases-095-specification |title=The Wireless Power Consortium Releases the 0.95 Specification |date=2009-09-11 |work=Electronic Component News |access-date=2017-09-27 |archive-date=2017-09-28 |archive-url=https://web.archive.org/web/20170928102836/https://www.ecnmag.com/article/2009/09/wireless-power-consortium-releases-095-specification |url-status=dead}}</ref> The Qi specification can be downloaded freely after registration.<ref name="Download">{{cite web |url=http://www.wirelesspowerconsortium.com/downloads/wireless-power-specification-part-1.html |title=Download Wireless Power Specification Part 1 |website=Wireless Power Consortium |archive-url=https://web.archive.org/web/20160403045021/https://www.wirelesspowerconsortium.com/downloads/wireless-power-specification-part-1.html |archive-date=April 3, 2016 |access-date=February 2, 2018}}</ref> Under the Qi specification, "low power" inductive transfers deliver power below 5 W using inductive coupling between two planar coils. These coils are typically 5 mm apart but can be up to 40 mm and possibly further apart.<ref name="youtube.com">{{cite web |title=eCoupled Wireless Power Through Granite |url=https://www.youtube.com/watch?v=1Lvd4dMloEY |work=YouTube |publisher=Google}}</ref> The Qi low-power specification has been renamed to the Qi Baseline Power Profile.<ref>{{Cite web |last=Battezzato |first=Paolo |date=September 12, 2019 |title=Wireless Charging in Consumer Applications |url=https://www.st.com/content/dam/AME/2019/developers-conference-2019/presentations/STDevCon19_6.1_Wireless_Charging.pdf |website=ST}}</ref>
Regulation of the output voltage is provided by a digital control loop where the power receiver communicates with the power transmitter and requests more or less power. Communication is unidirectional from the power receiver to the power transmitter via backscatter modulation. In backscatter modulation, the power-receiver coil is loaded, changing the current draw at the power transmitter. These current changes are monitored and demodulated into the information required for the two devices to work together.<ref name="Intro"/>
In 2011, the WPC began to extend the Qi specification to medium power.<ref name="Medium power extension">{{cite web |url=http://www.wirelesspowerconsortium.com/news/announcements/medium-power.html |title=Medium power extension |archive-url=https://web.archive.org/web/20120311181912/https://www.wirelesspowerconsortium.com/news/announcements/medium-power.html |archive-date=11 March 2012}}</ref> As of 2019, the Medium Power standard currently delivers 30 to 65 W. It is expected to eventually support up to 200 W (typically used for portable power tools, robotic vacuum cleaners, drones and e-bikes).<ref>{{Cite web |url=https://www.wirelesspowerconsortium.com/medium-power/ |title=Medium Power Standard |website=Wireless Power Consortium |access-date=2019-09-02 |archive-date=2019-09-02 |archive-url=https://web.archive.org/web/20190902085724/https://www.wirelesspowerconsortium.com/medium-power/ |url-status=dead }}</ref>
In 2015, the WPC also demonstrated a high-power specification, called "Ki", that will deliver up to 1 kW, allowing the powering of kitchen appliances among other high-power utilities.<ref name="Download"/> In 2015, WPC introduced the Qi Extended Power Profile specification which supports charging phones at up to 15 W. Phone companies that support this include LG, Sony, Xiaomi, and Sharp.<ref>{{Cite web |url=http://www.lgnewsroom.com/2017/11/lg-and-idt-partner-on-worlds-first-qi-extended-power-profile-smartphone/ |title=LG and IDT Partner on World's First Qi Extended Power Profile Smartphone |date=2017-11-07 |website=LG Newsroom |language=en-US |access-date=2019-09-03}}</ref><ref>{{Cite press release |url=https://www.prnewswire.com/news-releases/sony-mobile-selects-idt-wireless-charging-chipset-for-xz2-smartphones-and-wireless-charging-dock-solution-300643902.html |title=Sony Mobile Selects IDT Wireless Charging Chipset for XZ2 Smartphones and Wireless Charging Dock Solution |website=www.prnewswire.com |language=en |access-date=2019-09-03}}</ref><ref>{{Cite web |url=https://www.chargerlab.com/interviewing-wpc-chairman-menno-treffers-the-future-is-wireless/ |title=Interviewing WPC Chairman Menno Treffers: the Future is Wireless – Chargerlab |last=Floyd |date=14 May 2019 |language=en-US |access-date=2019-09-03}}</ref><ref>{{Cite web |url=https://jp.sharp/products/aquos-r3/usability.html |title=Aquos R3のユーザビリティ｜Aquos：シャープ |website=シャープ スマートフォン・携帯電話 Aquos 公式サイト |language=ja |access-date=2019-09-03}}</ref>
In 2024, WPC upgraded Ki to support 2.2 kW wireless power delivery.<ref>{{Cite web |title=WPC Announces Launch of Ki Certification Testing |url=https://www.wirelesspowerconsortium.com/media/i3hiylhk/ki-certification-announcement-media-release-final-rev1-528.pdf}}</ref><ref>{{Cite web |title=Ki Cordless Kitchen |url=https://www.wirelesspowerconsortium.com/standards/ki-cordless-kitchen/ |access-date=2025-06-12 |website=Wireless Power Consortium |language=en}}</ref>
WPC introduced Proprietary Power Delivery Extension to allow phone OEMs to deliver higher than Baseline Power Profile's 5 W or the Extended Power Profile's 15 W. Currently, only Samsung has published their compliance test.<ref>{{Cite web |url=https://www.wirelesspowerconsortium.com/knowledge-base/testing-and-certification/safety-of-proprietary-power-extensions.html |title=Safety of Proprietary Extensions |website=Wireless Power Consortium |access-date=2019-09-03 |archive-date=2019-09-03 |archive-url=https://web.archive.org/web/20190903051629/https://www.wirelesspowerconsortium.com/knowledge-base/testing-and-certification/safety-of-proprietary-power-extensions.html |url-status=dead }}</ref> Other phone companies that use proprietary standards for fast wireless charging include Apple, Huawei and Google.{{citation needed|date=August 2021}}
With Qi version 2.0, WPC introduced Magnetic Power Profile (MPP), an optional part of the specification based on Apple's MagSafe for iPhone. This enables magnetic attachment and alignment with a ring of permanent magnets around the charging coil and is backwards compatible with MagSafe devices. Devices which implement MPP use a new logo and branding, Qi2 in a circle, to distinguish them from Qi devices that do not support MPP (even if they otherwise support Qi v2.0 or later).<ref>{{Cite web |last=Hollister |first=Sean |date=2023-01-04 |title=Qi2: How Apple might finally harness MagSafe by giving it away |url=https://www.theverge.com/2023/1/3/23538131/qi2-wireless-charging-apple-samsung |access-date=2023-02-16 |website=The Verge |language=en-US}}</ref> The "Qi2 in a circle" logo has previously been sporadically used for Qi2 without MPP, this usage is officially disapproved for new products. Previously Qi(1) products are to be labeled as Qi2, as use of the Qi(1) logo has been discontinued.<ref>{{Cite web |last=Brecher |first=Hannes |date=2024-08-20 |title=Qi2 without magnets: MagSafe alternative causes confusion with misleading marketing |url=https://www.notebookcheck.net/Qi2-without-magnets-MagSafe-alternative-causes-confusion-with-misleading-marketing.877319.0.html |access-date=2025-09-10 |website=Notebookcheck |language=en}}</ref>
== Adoption == Nokia first adopted Qi in its Lumia 920, and Samsung Mobile on the Galaxy S3 (supported via a retrofittable official Samsung back cover accessory) in 2012,<ref name=wiredqi>Wired, [https://www.wired.co.uk/article/what-is-qi-wireless-charging Qi Wireless Charging: What Is It And How Does It Work In Nokia's Lumia 920?], 5 September 2012</ref> the Google/LG Nexus 4 followed later that year. Toyota began offering a Qi charging cradle as a factory option on its 2013 Avalon Limited,<ref name=theverge>The Verge, [https://www.theverge.com/2012/12/19/3785166/toyota-2013-avalon-limited-first-car-qi-wireless-charging Toyota's 2013 Avalon Limited becomes world's first car to adopt Qi wireless charging], 19 December 2012</ref> with Ssangyong the second car manufacturer to offer a Qi option, also in 2013.<ref name=torquenews>Torque News, [https://www.torquenews.com/1075/qi-wireless-charging-system-adopted-second-automaker-use-cars Qi wireless charging system adopted by second automaker for use in cars], 25 February 2013</ref>
As the Qi standard gained popularity, ''Qi Hotspots'' began to arise in places such as coffee shops, airports, sports arenas, etc.<ref>{{Cite web |last=Consortium |first=The Wireless Power |title=Global Qi Standard Powers Up Wireless Charging |url=https://www.prnewswire.com/news-releases/global-qi-standard-powers-up-wireless-charging-102043348.html |access-date=2025-12-19 |website=www.prnewswire.com |language=en}}</ref> In 2012, The Coffee Bean and Tea Leaf, a US coffee chain, announced plans to install inductive charging stations at selected major metropolitan cities,<ref>{{cite web |url=http://press.nokia.com/2012/09/05/nokia-and-the-coffee-bean-tea-leaf%C2%AE-form-partnership-to-introduce-wireless-charging-to-cafes-across-the-united-states/ |title=Nokia and The Coffee Bean & Tea Leaf form partnership to introduce wireless charging to cafés across the United States |publisher=Nokia |date=September 5, 2012 |access-date=September 21, 2012 |archive-url=https://web.archive.org/web/20120920230728/http://press.nokia.com/2012/09/05/nokia-and-the-coffee-bean-tea-leaf%c2%ae-form-partnership-to-introduce-wireless-charging-to-cafes-across-the-united-states/ |archive-date=September 20, 2012 |url-status=dead}}</ref> as did Virgin Atlantic, for United Kingdom's London Heathrow Airport,<ref>{{cite web |url=http://press.nokia.com/2012/09/05/nokia-and-virgin-atlantic-partner-to-introduce-wireless-charging-to-virgin-atlantic-clubhouse-lounges/ |title=Nokia and Virgin Atlantic partner to introduce wireless charging to Virgin Atlantic Clubhouse Lounges |publisher=Nokia |date=September 5, 2012 |access-date=September 21, 2012 |archive-url=https://web.archive.org/web/20120920230755/http://press.nokia.com/2012/09/05/nokia-and-virgin-atlantic-partner-to-introduce-wireless-charging-to-virgin-atlantic-clubhouse-lounges/ |archive-date=September 20, 2012 |url-status=dead}}</ref> and New York City's John F. Kennedy International Airport.<ref>{{cite web |url=http://conversations.nokia.com/2012/09/11/nokia-flies-virgin-atlantic-on-wireless-charging/ |title=Nokia flies Virgin Atlantic on wireless charging |publisher=Nokia |date=September 11, 2012 |access-date=September 21, 2012 |archive-url=https://web.archive.org/web/20120915083820/http://conversations.nokia.com/2012/09/11/nokia-flies-virgin-atlantic-on-wireless-charging/ |archive-date=September 15, 2012 |url-status=dead}}</ref>
In 2015, a survey found that 76% of people surveyed in the United States and China were aware of wireless charging (an increase from 36% the previous year), and 16% of those were using it daily.<ref name=ihsmarkit>IHS Markit, [http://news.ihsmarkit.com/press-release/technology/consumer-awareness-wireless-charging-doubles-76-percent-2015-ihs-says Consumer Awareness of Wireless Charging Doubles to 76 Percent in 2015, IHS Says] {{Webarchive|url=https://web.archive.org/web/20190402200306/https://news.ihsmarkit.com/press-release/technology/consumer-awareness-wireless-charging-doubles-76-percent-2015-ihs-says |date=2019-04-02 }}, 24 June 2015</ref> Furniture retailer IKEA introduced lamps and tables with integrated wireless chargers for sale in 2015,<ref>{{cite web |last1=Brian |first1=Matt |title=IKEA will start selling wireless charging lamps and tables |url=https://www.engadget.com/2015/02/28/ikea-wireless-charging/ |website=Engadget |date=March 2015 |access-date=1 March 2015}}</ref> and the Lexus NX gained an optional Qi charging pad in the center console.<ref>{{Cite web |url=http://www.lexus.com/models/NX-hybrid/features/wireless-charger |title=Wireless Charger – Unbound Convenience |website=www.lexus.com |archive-url=https://web.archive.org/web/20150209131617/http://www.lexus.com/models/NX-hybrid/features/wireless-charger |archive-date=2015-02-09 |url-status=dead |access-date=2017-08-07}}</ref> An estimated 120 million wirelessly charging phones were sold that year,<ref name=ihsmarkit /> notably the Samsung Galaxy S6, which supported both Qi and the competing Power Matters Alliance standards.<ref name=wiredmess>Wired, [https://www.wired.com/2015/11/wireless-charging-airfuel-resence-qi-wpc/ Wireless Charging Is Still a Mess, But It Won't Be Forever], 12 November 2015</ref>
By early 2017, Qi had displaced other competing standards such as Rezence.<ref name=eandt>E&T, [https://eandt.theiet.org/content/articles/2017/02/qi-wireless-charging-standard-emerges-victorious-adoption-rapidly-increasing/ Qi wireless charging standard emerges victorious; adoption rapidly increasing], 17 February 2017</ref> On September 12, 2017, Apple announced that their new smartphones, the iPhone 8, iPhone 8 Plus, and the iPhone X, would support the Qi standard. Since then, every new iPhone version has supported the Qi wireless charging standard.<ref>{{cite web |url=https://tenpire.com/everything-you-need-to-know-about-qi-wireless-charging/ |title=Everything You Need To Know About Qi Wireless Charging |publisher=Tenpire |date=June 8, 2019 |access-date=August 20, 2019 |archive-date=August 20, 2019 |archive-url=https://web.archive.org/web/20190820105144/https://tenpire.com/everything-you-need-to-know-about-qi-wireless-charging/ |url-status=dead}}</ref> Apple also announced plans to expand the standard with a new protocol called AirPower, which would have added the ability to charge multiple devices at once; however, this was canceled on March 29, 2019.<ref>{{Cite web |url=https://techcrunch.com/2019/03/29/apple-cancels-airpower-product-citing-inability-to-meet-its-high-standards-for-hardware/ |title=Apple cancels AirPower product, citing inability to meet its high standards for hardware |date=29 March 2019}}</ref>
By the initial launch of iOS 17 in 2023, Apple launched the iPhone 15 models and iPhone 15 Pro models to support the fast 15 W Qi2-certified wireless charging.<ref>{{Cite web |title=Apple debuts iPhone 15 and iPhone 15 Plus |url=https://www.apple.com/newsroom/2023/09/apple-debuts-iphone-15-and-iphone-15-plus/ |access-date=2024-10-13 |website=Apple Newsroom |language=en-US}}</ref><ref>{{Cite web |title=Apple unveils iPhone 15 Pro and iPhone 15 Pro Max |url=https://www.apple.com/newsroom/2023/09/apple-unveils-iphone-15-pro-and-iphone-15-pro-max/ |access-date=2024-10-13 |website=Apple Newsroom |language=en-US}}</ref> With iOS 17.2, Apple added the fast 15W Qi2-certified wireless charging support for the iPhone 13 models, iPhone 13 Pro models, iPhone 14 models and iPhone 14 Pro models.<ref>{{Cite web |last=Peters |first=Jay |date=2023-12-05 |title=iPhone 13 and iPhone 14 will get Qi2 support with iOS 17.2 |url=https://www.theverge.com/2023/12/5/23989606/iphone-13-14-qi2-magsafe-compatible-apple-ios-17-2 |access-date=2024-10-13 |website=The Verge |language=en}}</ref>
In July 2024, HMD Global announced the Skyline, which became the first Android device to support the Qi2 MPP standard.<ref>{{Cite web |date=2024-07-18 |title=HMD Skyline: More than a pretty face |url=https://www.hmd.com/en_int/press/hmd-skyline-more-than-a-pretty-face |access-date=2025-10-06 |website=HMD - Human Mobile Devices |language=en}}</ref><ref>{{Cite magazine |last=Chokkattu |first=Julian |date=2024-08-14 |title=HMD's Skyline Is User-Repairable, but Its Qi2 Support Raises Some Concerns |url=https://www.wired.com/review/hmd-skyline/ |access-date=2025-09-11 |magazine=WIRED |language=en-US}}</ref>
On September 9, 2024, alongside the announcement of the iPhone 16 models and iPhone 16 Pro models, Apple launched a new 25 W MagSafe charger featuring a woven braided cable design, available in 1 m and 2 m length options and maintaining the compatibility with the 15 W Qi2-certified wireless charging standard.<ref>{{Cite web |title=Apple introduces iPhone 16 and iPhone 16 Plus |url=https://www.apple.com/newsroom/2024/09/apple-introduces-iphone-16-and-iphone-16-plus/ |access-date=2024-10-13 |website=Apple Newsroom |language=en-US}}</ref><ref>{{Cite web |title=Apple debuts iPhone 16 Pro and iPhone 16 Pro Max |url=https://www.apple.com/newsroom/2024/09/apple-debuts-iphone-16-pro-and-iphone-16-pro-max/ |access-date=2024-10-13 |website=Apple Newsroom |language=en-US}}</ref>
In January 2025, Samsung announced that their latest Galaxy S25 series phones are "Qi2 Ready". This means that while the devices themselves do not have magnets built-in, they are fully compatible with Qi2 when paired with a magnetic case.<ref>{{Cite magazine |last=Chokkattu |first=Julian |title=Samsung Says Its Galaxy S25 Is 'Qi2 Ready.' Here's What That Really Means |url=https://www.wired.com/story/qi2-ready-certified-phones-and-cases/ |access-date=2025-10-06 |magazine=Wired |language=en-US |issn=1059-1028}}</ref>
In August 2025, the Google Pixel 10 range became the first major Android phones to include built-in magnets for Qi2 MPP.<ref>{{Cite web |date=2025-08-20 |title=Take a look at the new Qi2 Pixelsnap accessories |url=https://blog.google/products/pixel/pixelsnap-accessories-charger-ring-stand/ |access-date=2025-10-06 |website=Google |language=en-us}}</ref> The Google Pixel 10 Pro XL also became the first device to support the new Qi2 25W standard.<ref>{{Cite web |title=[QI-23234] Google - Pixel 10 Pro XL |url=https://jpsapi.wirelesspowerconsortium.com/products/qi/23234 |access-date=2025-10-06 |website=Wireless Power Consortium |language=en}}</ref>
== Version history == {| class="wikitable" |+ Qi versions<ref name=wpc-qi-history>{{Cite web |url=https://www.wirelesspowerconsortium.com/knowledge-base/specifications/history-of-the-qi-specifications/|title=History of the Qi specification |website=Wireless Power Consortium |access-date=2025-07-27 |archive-date=2025-07-27 |archive-url=https://web.archive.org/web/20250727235100/https://www.wirelesspowerconsortium.com/knowledge-base/specifications/history-of-the-qi-specifications/ |url-status=live}}</ref> ! Version number ! Released<ref name=wpc-qi-history/> ! Maximum power ! Notes |- !1.0 |July 2010 |5 W |Power transmitter can be a single coil, coil array, or moving coil |- !1.1 |March 2012 |5 W |12 different transmitter specifications, foreign object detection to prevent heating of metal objects near transmitter, added powering transmitter over USB |- !1.2 |October 2015 |Baseline Power Profile: 5 W Extended Power Profile: 15 W |Increased maximum transmitter power to 15 W, improved thermal tests for transmitters, improved timing specs, improved foreign object detection sensitivity, optional receiver ID (WP-ID).
Labeled by Samsung as "Fast Wireless Charging" (initially 10 W, introduced on the Galaxy Note 5 and S6 edge plus, August 2015) requires charging plate to be connected to Qualcomm Quick Charge 2.0-enabled 15 W USB charger (9 V, 1.67 A support). <!-- Mentioned in :de:Drahtlose_Energieübertragung#Qi but not main article in German Wikipedia. --> |- ! 1.2.3 | February 2017 | Extended Power Profile Class 0: 5–30 W | Added Power Class 0 which allows the consumer to negotiate up to 30 W from the charger<ref>{{Cite web |url=https://www.wirelesspowerconsortium.com/data/downloadables/2/2/0/5/qi-wireless-power-specification-non-confidential.zip |title=Qi specifications |website=Wireless Power Consortium |url-status=live |archive-url=https://web.archive.org/web/20200420083247/https://www.wirelesspowerconsortium.com/data/downloadables/2/2/0/5/qi-wireless-power-specification-non-confidential.zip |archive-date=2020-04-20 |access-date=2020-04-20}}</ref> |- ! 1.3 | January 2021 |{{dunno|}} | * Completely restructured Specification documents with 15 thematic books describing different aspects of the system * Support for authentication of Qi Certified wireless chargers * Improved foreign object detection features and testing (including a new low-Q test power receiver) * Restrictions on the negotiable power levels * Resolution of mistakes, inconsistencies, and ambiguities * A substantial number of new compliance tests covering the new features as well as features that were not tested in older version of the specification |- ! 2.0 | April 2023 | 15 W<ref>{{cite web |date=12 September 2023 |title=What is Qi2 magnetic charging? And why you'll want it. |url=https://www.belkin.com/clp-what-is-qi2-wireless-charging-blog.html |access-date=13 September 2023 |website=Belkin}}</ref> | * Incorporates Apple's MagSafe standard for alignment and mounting. Rather than requiring the user to manually align the coils through trial and error while looking for an indication of charging, it aligns the device and charging coil automatically, and also provides for mounting small devices, e.g. phones, securely enough for stationary use, or both. * Initial standard supports up to 15 W power, but higher power profiles are planned. * Also referred to as Qi2, and certified products may display a Qi2 logo. |- !2.1 |September 2024 |{{dunno|}} | * Support for Automatic Alignment Profile (AAP) Power Transmitters * Support for Magnetic Accessory Covers – MCPE and MCPM Profiles * Updated Power Profile and Feature definitions * Updated tests to resolve smartphone camera bump mechanical interference with wireless charger * Error corrections |- !2.2 |April 2025 |25 W | * Support for up to 25 watt power transfer * Power modes optimizing the power transfer to the capabilities of (USB-C) power adapters * Gain measurement and gain linearization to optimize the power control * Re-introducing capacitive modulation for power receiver communications * Improved magnetic power loss accounting * Mated Q-factor check to verify absence of foreign object before starting the power transfer * Power loss calibration for foreign object detection above 15 watt power levels |- !2.2.1 |July 2025 |{{dunno|}} | Introduced Qi2 25W branding for 25 watt devices and chargers |- !2.3 |December 2025 | |System gain change reporting for a power transmitter. |}
=== Qi Medium Power standard === * 2019 – 30 W to 65 W * Future – 200 W
=== Ki versions === * 2015 – 1000 W * 2024 – 2200 W
== See also == * Wireless power transfer * Near-field communication * WiPower * Open Dots * MagSafe
== References == {{reflist}}
Category:Wireless energy transfer Category:Computer-related introductions in 2009 Category:Open standards