The only time the atomizer drains any current from the battery is when you puff on it so you can leave it attached and it wont matter.
Phil

cos now I using 103 already left the one and only
and 103 so far I used as backup last time
so now I left this one only so full time using it
hmm what I heard 103 battery last only 1 to 2 hrs if constant smoke?cart wise puff cannot last long
cos is small.
that why I feel weird cos last time always use longer e cig .