Some customers may experience the following symptoms of the wireless charger (Qi), even when the mobile device (smartphone etc.) is placed in the proper position on the wireless charger (Qi). It does not start charging. Soon after starting, it stops charging with the indicator flashing in red. Soon after starting, it stops charging without any visible sign. These symptoms may be caused by improper control software of the wireless charger (Qi). To eliminate these concerns, the specification of the wireless charger (Qi) has been modified.