Say you plug your laptop on your Car battery to charge...
 

What happens to the battery?

does it weaken? die out? stay intact?

Im asking because I bought a brand new battery for my car and don't want to make it die out already!

thanks

Has no effect unless you car is not running, then it will use a very small amout of the batteries juice which will be replaced once you drive the car again!

I've left it charging with car not running for over two hours with no problems( today as a matter of fact). I imagine it would run the battery down eventually if left for a long time. While running, I would think it has no effect at all.

just charge it while the cars running and youll def be straight

thanks guys!