Why Does My Wireless Charger Make a Noise?
Clicking, buzzing, or high-pitched sounds from a wireless charger are usually normal coil whine or foreign object detection. Here is when to be concerned.
Problem Summary
Your wireless charger is making an unusual sound — a hiss, buzz, click, or high-pitched whine. You want to know if this is normal or a sign of a problem.
Sound Types: Normal vs Concerning
Normal: Faint High-Pitched Whine or Hiss
Cause: Coil whine. The transmitter coil in a wireless charger oscillates at high frequency (100-200 kHz for Qi). This creates a faint electromagnetic resonance that some people can hear, particularly in a quiet room.
What to do: Nothing. This is normal operation and harmless. Higher-quality chargers often have better coil dampening and produce less audible noise.
Normal: Soft Click When Device is Placed or Removed
Cause: The charger is detecting device placement and initiating or terminating the power handshake. A single soft click when placing or removing the phone is normal.
Concerning: Loud Buzzing or Humming
Cause: Electrical interference, loose coil windings, or a power supply issue. Often indicates a cheap or failing charger.
What to do: Test with a different power adapter first. If the buzzing persists, replace the charger.
Concerning: Repeated Clicking
Cause: The charger is repeatedly trying and failing to initiate charging. Usually a foreign object issue or misalignment triggering the detection circuit repeatedly.
What to do: Remove all objects from the pad, clean the surface, reposition the phone, and remove the case.
Concerning: Crackling or Popping
Cause: This can indicate electrical arcing or a failing capacitor inside the charger. Not common but worth taking seriously.
What to do: Discontinue use immediately and replace the charger.
Phone Vibrating on Pad
If the phone itself vibrates while charging (not from notifications), the charging pad may be resonating with the phone on a hard surface. Try placing a small cloth or mat under the charger, or reposition the phone.