will not
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The wireless charging case does not slow down the charging speed.
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Wireless charging is possible with a phone case. The phone case is not affecting wireless charging. Unless your phone case is very thick, it has isolated the thickest limit of the contact between the charging bank and the mobile phone. In addition, you will not be limited in charging, you can directly charge it, and the charging will be very fast, without affecting the charging speed
If our phone case is metal, it will affect the effect of wireless charging, or even can not be charged.