Hello,
I have bought a Anker powerport 5, and i would like to know the following:
When i leave my powerport plugged in the wall outlet with only a cable and no device connected, is it then always powered on?
If so, can it be a risk?
Thank you.
Greetings,
Marcel
It shouldn’t be a risk
Yes, it is always powered ON. It would be good to couple it with a smart plug to power it ON / OFF based on your charging habits, like say, power it ON during Day from 9 to 5 or Only during nights from 10pm to 7am…
I have done this with couple of my chargers, couple it with Eufy Smartplugs 
It may / may not be risk based on where it is connected. Best practice - turn it off when not in use and save power
No problem.
I keep my charger always plugged.
Needs a little bit of energy, but this will not “overstretch” your energy bill.
I leave my PowerPort 5 plugged in and it is always on. The power use is negligible unless something is connected and charging.