Fa200 power draw non-wired in when the car is off

[Mysticode]

I have an FA200 in my cigarette 12v outlet and I was wondering if the power draw when the car is off is enough to drain my battery if left plugged in for just 1 or 2 days. Can it be left plugged in and left for longer? Curious how this all works with this model.

The manual is very light in details beyond setting the battery protector setting, which I have not yet done.

Thank you