Whining noise coming from stereo when charging my cell phone

[hayden]

Cell phone is plugged into the cigarette lighter with a USB cable attached to the charger. This creates a whining noise through the stereo (when it's on) and it becomes louder the higher the engine revs (and louder when the stereo volume is louder).

Is this normal? is there an easy fix to it? Does my charger just suck?

Sorry if this has been covered, i searched and found nothing

[SailDesign]

Mine doesn't do that, so I assume your charger sux.
To check it, use your charger in a friend's car, or use a friend's charger in your car and see which way around the problem still happens.