Qi2 vs Qi2 25W: what changed from the 15W generation to 25W
The original Qi2 generation introduced magnetic alignment with up to 15W charging, while Qi v2.2.1 is branded Qi2 25W and extends the certified power class to 25W.
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Topic hub
Wireless Power
Qi2, Qi2 25W, magnetic alignment, certification, and wireless charging compatibility.
This is a discovery hub, not a standalone article. Most substantive assets are English originals, with a small Japanese-original set retained. Each card states the original language so discovery copy is never confused with a canonical translation.
Published knowledge
Qi2 MPP vs EPP: understand the magnetic profile and logo difference
Qi v2.0 includes Magnetic Power Profile (MPP) and an Extended Power Profile (EPP) path; WPC associates MPP with the Qi2 logo while EPP products remain under the Qi mark.
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How to verify Qi2 certification: check the logo and WPC certified-product database
WPC states that certified products can use the official Qi/Qi2 marks, and buyers can cross-check a product in the Wireless Power Consortium certified-product database.
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Qi2 25W end-to-end support: check both charger and receiving device
A Japanese-original compatibility guide separating Qi2 25W transmitter capability, receiver support, certification, and implementation conditions.
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Qi certification mark matrix: Qi, Qi2, and Qi2 25W are distinct verification classes
WPC publishes distinct certification marks for Qi, Qi2, and Qi2 25W; buyers should match the mark and certified-product record to the capability they actually need.
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Qi2 certified-model cross-check worksheet
Record the seller model, WPC-certified model, certification class, and receiving-device support before treating a marketplace listing as proof of Qi2 or Qi2 25W capability.
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Qi2 power class vs device support: why charger maximum and phone maximum are different numbers
A wireless charger can advertise a higher Qi2 power class than a receiving device accepts; the end-to-end charging ceiling is constrained by the supported intersection, not the largest number on the charger.
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