The mobile phone case and its ring buckle will affect the wireless charging efficiency of the mobile phone.
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Qi wireless charging has requirements for charging distance, and the maximum charging distance is only 10 mm. This is a bit \"blocking\" for Chinese mobile phone users who like to use mobile phone cases, although there is no need to remove the mobile phone case, the thickness of the mobile phone case has requirements, and some charging plates are marked, and the thickness of the protective case should not exceed 3 mm.
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Since most smartphones that support wireless charging use Qi wireless charging standard technology. The technology uses electromagnetic induction technology to convert current into electromagnetic, and the phone charges by converting electromagnetic into current through a built-in coil. However, the drawback of this technology is that it will heat up the device, so the use of wireless chargers for mobile phones with phone cases affects their heat dissipation.