Qi and Qi2 wireless charging standards

What is Qi

Qi is an open wireless charging standard developed by the Wireless Power Consortium (WPC) and is one of the most widely adopted wireless charging standards in consumer electronics.

The first version of the Qi standard was released in 2010. In April 2023, the WPC released the Qi v2.0 specification. Its Magnetic Power Profile (MPP), used for Qi2 devices, is based on MagSafe technology contributed by Apple to the WPC and provides magnetic alignment between the transmitter and receiver for more accurate positioning and efficient charging.

Qi standard versions: 1.0 to 2.3

Qi 1.0 (July 2010) - Baseline Power Profile (BPP), with power up to 5W. In the early protocol, communication was unidirectional - from the power receiver to the transmitter.
Qi 1.1 (March 2012) - expanded the range of transmitter designs, increased the sensitivity of Foreign Object Detection (FOD), and added the option to power a Qi transmitter from a USB charger.
Qi 1.2 (October 2015) - introduced the Extended Power Profile (EPP) with power up to 15W, improved thermal testing and FOD, and added an optional receiver identifier (WP-ID). The extended protocol introduced bidirectional communication between the receiver and transmitter.
Qi 1.3 (January 2021) - added authentication of Qi Certified transmitters, improved FOD and testing procedures, and introduced additional restrictions on negotiable power levels.
Qi 2.0 (April 2023) - introduced the Magnetic Power Profile (MPP), with magnetic attachment and alignment between the transmitter and receiver. MPP is based on Apple's MagSafe technology and is used for the Qi2 brand. MPP operates at 360 kHz and uses a new communication protocol. Qi v2.0 devices are not required to provide full backward compatibility with all Qi 1.x Certified products.
Qi 2.1 (September 2024) - added support for Automatic Alignment Profile (AAP) transmitters, Magnetic Accessory Cover profiles MCPE and MCPM, and new requirements for mechanical obstructions near the charging area.
Qi 2.2 (April 2025) - power up to 25W, power modes matched to USB-C charger capabilities, improved power control and foreign object detection (FOD) at power above 15W.
Qi v2.2.1 / Qi2 25W (July 2025) - the version under which WPC launched the Qi2 25W brand with MPP25.
Qi v2.3 (December 2025) - a subsequent version of the specification. Among its changes, the WPC lists system gain change reporting for power transmitters.

Latest Qi version

The latest version is Qi v2.3 (December 2025). It added only the communication of changes in system gain; maximum power remains 25W. As of October 2026, the WPC version history contains no newer versions (Qi 2.4, Qi 2.5, Qi3). According to media reports, WPC members discussed a Qi 50W specification, but WPC has not confirmed this news: whether it will be implemented, when and under which version is unknown.

Qi power profiles: BPP, EPP and MPP

BPP (Baseline Power Profile) - up to 5W, introduced in Qi 1.0.
EPP (Extended Power Profile) - up to 15W, introduced in Qi 1.2.
MPP (Magnetic Power Profile) - magnetic alignment and an operating frequency of 360 kHz, introduced in Qi 2.0 and used for the Qi2 brand. MPP25 from Qi v2.2.1 increases power to 25W.

What is Qi2 Ready

Qi2 Ready refers to a phone without built-in magnets that gains Qi2 magnetic attachment through a magnetic case. This is how Galaxy S25 and Galaxy S26 work.

Qi certification and compatibility

Qi Certified means that a product has passed independent laboratory tests for safety, interoperability and energy efficiency. According to WPC, the phrases "Qi compliant", "Qi compatible" or "Works with Qi" indicate that the product has not undergone certification. Only certified products may legally use the Qi logo, but the logo alone is no guarantee: finding the model in the WPC database is more reliable.

Devices and chargers with proprietary wireless charging modes may also support Qi. Available power depends on the specific transmitter, receiver, and supported Qi profile.
The certification and supported Qi version of a specific model should be checked in the WPC database. The iPhone 15 series was among the first Qi v2.0 Certified devices; some earlier iPhone models were also certified for Qi v2.0 with MPP later.
The WPC database includes certified UGREEN power banks with Qi v2.2.1, the MPP25 profile, and 25W charging power, including model PB775.
Wireless Power Consortium (WPC) official database of Qi Certified products.
The Samsung Galaxy S26 series supports different wireless charging power levels depending on the model: Galaxy S26 - up to 15W, Galaxy S26+ - up to 20W, and Galaxy S26 Ultra - up to 25W. (source)