That's normal, it's called coil whine.
Seriously?! Thats considered normal? I've got headache after working for a week with this thing! I tried dell G3 3779 with exactly the same specs just before buying gl703 and it had nothing like that! In fact thats the first laptop that does that, and I've had quite a few of those.
So I'd say this is way out of normal, especially for its price tag!
I don't know if it's me or this noises sounds kinda weird... It's not HDD because sound goes more from the battery side.
The sound stops when I disconnect charger cable, so is it really from battery? Is that normal?
I'm also set battery charging to maxium lifespan mode (60%), so maybe that's the problem? But once again... Is that normal even with maxiumum lifespan mode enabled?
Here is a video of this noises: