I just downloaded my stock tune with the VAP reader. I didn't see an option to disconnect. Does that mean my battery will drain unless I unplug the battery? Thanks.

 

You won't know until it happens.

1. Lock the car
2. Walk away
3. Come back in 5-10 minutes
4. Look through the windows and if the indicator lights on the door locks and the hazard light button is illuminated then you'll need to disconnect and reconnect the battery

 

I have connected and used the VAP V-Tech device some four or five times now, I simply turned the ignition off then pulled the OBD2 plug out when it had finished, and never had a single battery or electrical system problem.