Warning. Don't remove battery with usb power

[Nick Guenther]

On Mon, Mar 3, 2008 at 7:45 PM, Ben Wilson <ben at abcom.co.nz> wrote:
> Hey,
>
>  Just a reminder to everyone *NOT* to pull out the battery while the neo
>  has USB power.
>
>  You may not have heard it but the phone gets quite angry. As evident by
>  a quiet scream the phone emits as the components in its power system
>  begin to vibrate closer to magic smoke land.

Is this true? I haven't been worrying about the scream at all myself.
how do you know the whine is from power components?

-Nick