eVic-VT boost circuit inductor emits acontinuous high-frequency buzz, and the switching system that detects atomizerresistance produces an intermittent ticking noise rather like that of a quartz watch. These noises are normal, and should not cause concern in any device that isotherwise functioning normally. When the device goes into standby after a period of 3 minutes without use, or if the power button is pressed 5 times, all such noises will immediately cease.
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