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Gday having a problem with my car not charging the battery i can just start the car but as soon as i turn it off I am unable to turn it back un unless if I jumpstart it. I had Road Side Assist come over and they tested the voltage of the alternator and the battery, the battery outputs 1VT and the alternator outputs 44VT I was told that these is something using alot of power and this will need to be fixed by a mechanic, mechanics in my area are rip offs and I will like to see if I can address this problem without some shifty mechanic trying to charge me for a new alternator or something. When Road Side Assist left I asked him to keep the motor running and I noticed I had the air con on so I think maybe this is the reason why the alternator had a high output. I took the car out for a drive for 40 min to try and charge the battery but when I got home and turned the car off the motor would not start when I turned its back on but all other electronics were working (radio, headlines ect) I work a lot so it will be a while before I get the time to get this car relooked at so this post is just to give me some piece of mind until then. These problems started when I left the headlights on overnight so that drained the battery. Now bear with me my knowledge about battery’s is rusty, my battery is new (under 1 year old) and the fluid levels are fine. I think that leaving the headlights on just completely drained the battery and it needs to be recharged at a battery recharge centre (can’t be recharged by driving it) , and the reason why the alternator was outputting a high voltage was because I had the Air con on when Road Side Assist was testing the voltage levels. So what do you think? Should it just be a simple job of charging the battery? Or Is there a problem with the alternator? I am thinking if could just be a simple unconnected wire, a lose alternator belt or maybe something rusted (I’m also having problems with a leaking power steering pump, maybe the fluid rusted something on the alternator) Oh and if it helps my car is blue.