Abstract: In the past few years, more and more portable electronics devices adopts wireless power transfer technology that allow them to be recharged without the trouble of plugging in. The wireless power transfer technologies are not limited to low application. The conventional plug in charging may pose a potential risk of a electric shock to user if connecters are plugged or unplugged in a high humidity or rainy environment. Other issue that may affect their reliabilities includes insulation wear and oxidation/corrosion of metal contacts. The use of wireless charging techniques can eliminate these concerns.
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