Hello! first time poster here. I dont have an obd2 reader so i cant confirm whats wrong with my vehicle (2009 Dodge Avenger 2.7L) Little background Alternator gave out while driving, making loud clanking noises and eventually ran the battery dead. Got the car towed to my place. About a week later, i replace the alternator. I try to start the car, but it makes a winding sound like "weer weeer". I charge my battery for about 6 hours and same thing happens. "weeer weeer". Battery says its 100% charged. Perhaps its a dead cell i thought. I turned on the lights and tried to start the car, and the lights went dim. I read online that means the battery must have a dead cell. Replaced battery. No good, car lights still dim and goes "weeer wweer". I cleaned my connections prior to trying all of this. I also followed the negative cable around and used a wire brush to remove some dust and a little rust on a few connection points/bolts. Side notes The day my alternator died, something sparked and a electrical burn smell flooded my car for 10 minutes. Smell came from alternator side of car. Makes me wonder if the wire that connects to the alternator may have burned up inside? or was that the cause of why the alternator gave out later that day? When the old battery was low, i tried jumping. Same winding sound occured. The battery was only 1 year old, too bad the warranty is only 6 months. I need to change the oil, could something to do with the oil or oil pressure be causing this? I saw online that the cranking amps for dodge avenger is 525 or so, my current battery has 550. I hope to god the starter also didnt kick the bucket.