Significant buzzing/hissing noise when on battery power.

But instead of a quiet click when it checks the battery every 8 hours with a annoying loud buzz

I have one particular LCD monitor which has an adapter that keeps making very annoying fade-buzzing sound when monitor is under stand-by mode

Significant buzzing/hissing noise when on battery power.

What's the harm besides annoying clicking/buzzing?

I have sufficient runtime and (B