Nitro V15 USB ports still running on shut down?

I'm a bit confused—when I shut down my laptop, isn't it supposed to be completely off? But for some reason, my USB hub and external laptop cooler still run. It bugs me because when I turn my laptop on in the morning, the battery has drained by around 5-10%.

I know the obvious fix is to just unplug the USB devices, but I find that kind of annoying. Is there a complete solution for this?