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No unless you leave it in there for months. Want to drain it, the connect something to the battery and leave it on.
The head lights are the biggest long term drain on your battery. (The starter is a heavier drain, but you can't leave it on for very long.)
Yes
that keeps the dome lights on
yes you do waste battery and also if you leave it there to long the battery will die
Yes, headlights drain battery power, but it is only major if you leave them on when you turn the car off, because the car might not start up after a bit.
you drain your battery when you leave your lights on
you leave the car radio wind dheild wipers and bright lights on.
You do not need an isolater, but it is reccomended as without one you can drain your battery connected to your starter (your vehicle won't start). I do not run an isolater, just don't leave your accessories running and the battery won't drain.
YES!My version:A bad relay switch that goes bad can "stick" in the on position and leave what ever it powers on and drain the battery You should be able to see the item that is on.
I think you can just not for days
Your battery will drain if you leave it on too long, but it won't do any harm to the laser itself.