The maximum power for wireless charging of a mobile phone usually depends on the wireless charging technology and the specifications of the device. At present, the common wireless charging technologies on the market include the Qi standard and the AirFuel standard.
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According to the Qi standard, the current highest supported wireless charging power is 15W. This means that if you use wireless chargers and devices that are compatible with the Qi standard, the maximum power will be 15W.
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The AirFuel standard supports higher power transmission, with maximum power typically reaching 30W or more. However, it should be noted that the AirFuel standard is relatively new and not as popular as the Qi standard, so most mobile phones and charging devices still follow the Qi standard.
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It is important to remember that the actual wireless charging power that can be provided depends on the match between the phone and the charger. If your phone supports lower power wireless charging, even if you use a charger that supports higher power, you can only charge at the maximum power supported by your phone.
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Therefore, if you want to know the maximum power of a specific phone and wireless charger, check the specifications and technical notes of the relevant device.
Xiaomi has an air-cooled wireless charger that can reach 55w. However, not long ago, the state issued regulations that the maximum wireless charging should not exceed 50w.