They are just as sensitive as the auto
batteries. Probably not to good for use in a car. Although if the windows are up and the radio isn't blasting, it's fine. I am also pretty sure the 401 pt does run at 5v.
I actually pulled the battery connector from my 401 pass thru, and made a nicostick. That pretty much eliminates the need for a pass thru, since it will give me at least 10 hrs of pretty hard
vaping. Barely used anything else since building it.