lipo question

My TrueRC 5s 8000 mah pack just arrived, my hyperion is not here yet.

The battery has 19v on it under no load. would it be safe to run it once up and back in the parking lot just to see the power difference? or do I have to wait for the charger?

19v > 3v/cell which leads me to think 2 mins of run would be ok, but this is my 1st big lipo and I don't want to kill it out of impatience.

thx,

DT