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Wireless charging technology, general description

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All wireless charging in consumer electronics is based on inductive charging (electromagnetic induction between coils installed in the charger and charging device). The charging power and effectiveness significantly depend on distance from the charger (not more than 4cm) and mutual positioning (certain orientation of the inductance coils of the charging and charged devices).

The efficiency rate of inductive chargers usually falls between 70% and 80%, though some newer models boast efficiencies closer to 90%. However, there are a few methods used by charger manufacturers to simplify the positioning of the charged device - installing a few coils in the charging pad in order to allow the same charging experience despite vertical or horizontal smartphone orientation, using magnets to attach and position the charged device thereby improving charging efficiency and user experience.

Some manufacturers implement dual-coil designs to increase power output by transmitting power in parallel (OPPO AirVOOC).​

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Google wireless charging

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Google also has developed proprietary wireless charging technology.

Wireless charging rates up to 18W (Pixel 8) and up to 23W (Pixel 8 Pro) charging with Google Pixel Stand (2nd gen). For other Qi-certified EPP devices, it provides up to 15W (EPP-Extended Power Profile).

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Note: The Pixel 8, 8 Pro, and Pixel 9 smartphones do not support Qi2, but can be charged wirelessly at higher power than Qi2 can provide using Google Pixel Stand.​​

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Samsung Wireless Fast Charge - PPDE (Proprietary Power Delivery Extension)

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Samsung has its own proprietary version of wireless charging technology.

Versions:

  • Samsung flagmanship smartphones starting from S6 are supporting Qi1.0 (BPP - 5W)

  • Wireless fast charge (PPDE - Proprietary Power Delivery Extension) - is the extension based on BPP and provides up to 9W. This is Samsung's proprietary technology. It is compatible with BPP (Qi1.0 - 5W), but not with EPP (Qi1.2 and higher).

  • (Super) Fast Wireless Charging 2.0. It provides up to 15W for Samsung flagship devices and up to 7.5W for 3d party Apple/Qi-compatible devices​​​​

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Vivo, iQOO Wireless Flash Charge

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This is proprietary wireless charging technology, compatible with Qi (up to 15W).

There is only one version available 50W/ the charger has a dual-coil design that lets you place your phone in either portrait or landscape orientations with the same charging power output result. The charger has a low-noise 3600rpm fan, which can be switched to silent mode by reducing charging power to 15W.​​​​

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HUAWEI (HONOR) SuperCharge Wireless​


This is proprietary wireless charging technology compatible with Qi charging protocol.

Versions:

  • 27W

  • 40W (Huawei CP62 charger model)

  • 50W (Huawei CP62R модель зарядки)

  • 66W

  • 80W - double coil design, supports vertical and horizontal charging. It has night silent mode, foreign object detection and other safety features.

  • 100W​

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Xiaomi wireless charging (Hypercharge)

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This is proprietary wireless charging technology compatible with Qi (Apple smartphones -7.5W, Samsung 10W, other Qi devices - 10W (EPP10W))

  • 20W - double coil design (vertical and horizontal charging orientation)

  • 30W

  • 40W

  • 50W

  • 80W Hypercharge - dual coil design vertical and horizontal charging orientation).​

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Mediatek Pump Express 4.0

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It was announced that PE 4.0 standard supports wireless charging but there are no products on the market that actually implement this technology to discover their wireless capabilities.​

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Motorola TurboPower Wireless Charging

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Motorola produces Qi-compatible wireless charging stands under its brand name Turbopower. It's fully Qi-compatible.

There are exist 3 versions of the chargers: 10W, 15W, and 15W stand with 2 coils.​​

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Infinix MagCharge, Wireless All-Round FastCharge

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Infinix has a few wireless chargers:

  • 15W - standard Qi-compatible wireless charging

  • 20W MagCharge - require a MagCase case for their smartphone in order to be magnetically attached to the charging pad. There are no constant magnets, magnetism is created as a result of electromagnetic induction during charging.

  • 110W Wireless All-Round FastCharge - proprietary technology with dual coil design for vertical and horizontal charging.​

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