How can I disable the alert when I plug in the charger?

[Koltrane]

I've had a 920 since November and love it. Today, my boss came over and showed me the black 920 he got for Christmas. He asked me how he could disable the sounds the phone makes when plugging/unplugging the charger. I looked and searched online and found no answer. Does anyone know if there is a way to disable those sounds?

 

[RyoTGZ]

Besides turning the volume to 0... don't think there is a way.

 

[realwarder]

Had this last night... plugged in to charge and woke the wife up.

Great.

At least the iPhone mutes this if the mute switch is on.