Ok, here's my issue. Yesteday when I was working on my car, I left my car in ignition to play music (should have put it into ACC) thinking my battery is good enough to last a while..
4 hours later, the music just died and I realised I've just drained my battery... So I had to get the car jump started. It starts with no problems at all and end up going for a 5-10mins drive to dinner. But after dinner, battery went flat again.. So I used a jumper pack to start the car.
Once started, I went for a 1-2hr cruise, and what I notice is, everytime I put my highbeam on or even fog lights, it would drain so much battery that it will restart my headunit and also stalls the car...
And today, I started the car a few times, a couple of times it took a few secs to start, but didn't have to use the jumper pack, but the highbeam problem is still there...
But what I don't get is, my battery was 100% healthy before I drained it out and never had any of those issues above, which I'm guessing my alternator was fine before that...
So what can cause these issues? And the battery should have been fully charged by a 1-2hr drive right? And is it true that once the battery is drained, it won't hold charge again?..
Any help would be appreciated!