Another Challenger dead battery story. - Page 3 - Dodge Challenger Forum: Challenger & SRT8 Forums
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#21 (permalink) Old 11-22-2012, 10:20 AM
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wow, as a new owner of a 2010 srt8, and not my daily driver this is now a concern. is this a flaw for these cars ? my srt8 is going to sit until the weekends. am i ok ? any suggestions would be great.
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#22 (permalink) Old 11-22-2012, 10:36 AM
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I experienced a dead battery twice and had to place it on my charger. Both times it was caused by my trunk accidently popping open under my car cover.

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#23 (permalink) Old 11-22-2012, 10:45 AM
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If my battery is over two years old I replace it the first time I have an issue, batteries don't last long in the Nevada summers.

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#24 (permalink) Old 11-22-2012, 11:05 AM
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This sounds a bit like the Customer Satisfaction Notification M24. I just had it done on my 2011 R/T. They told me that some cars in 2011 had a door window switch that could rust inside. Once rusted it could intermittently repeat the open and shut action of the window smart glass feature until the battery died..... I am sure I saw it discussed and a copy of the notification posted. You could search the site for M24 to find it.

By the way it took them 4hrs of hard labor to change the switches because they are located deep inside the door. The switches are on back order with each dealership only allowed to order 4 every 14 days…..
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#25 (permalink) Old 11-22-2012, 03:45 PM
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Quote:
Originally Posted by corn View Post
wow, as a new owner of a 2010 srt8, and not my daily driver this is now a concern. is this a flaw for these cars ? my srt8 is going to sit until the weekends. am i ok ? any suggestions would be great.
If you drive it for over 30 minutes each week, it is really not a concern. Regardless I keep mine on Battery Tender if it is going to set for more than a week or two. I've come to the conclusion that most premature battery failures are due to the battery setting partially or fully discharged. Letting one go completely dead does major damage to the life expectancy of the battery. I have not had to replace a battery in less than 6 years since I started being careful to keep them charged. This includes vehicles and other power equipment batteries. Most last more than 8 years.

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#26 (permalink) Old 11-22-2012, 11:14 PM
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Doors unlocked,alarm not engaged.
This happened to me once before. The alarm was on the first time. This time I'm positive the alarm was off.
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#27 (permalink) Old 11-22-2012, 11:20 PM
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Battery Drain

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Originally Posted by waumo View Post
This information is from a 09 SRT but I doubt the other models are different.
Parasitic draw after everything powers down is about 30 mA (0.030 Amp).
With the alarm activated, the parasitic draw is about 35 mA so the alarm is not a concern.
At 30 mA after 60 days, a good battery will be weak but should start the car. After 90 days, the battery will likely be "dead".

Question for the OP - do you have ANY aftermarket equipment installed?
Trinity or other tuner?
Anything plugged into the OBDII port? Gauges, etc
Cell phone charger, etc?
A Trinity without the sleep timer set to 30 sec will keep the CAN bus awake and kill your battery in a day or so. With the sleep timer properly set, my Trinity still draws almost 100 mA when dormant so I don't leave it plugged in for more than a few days.
A cell phone charger I checked drew 200 mA even when the cell phone was charged.
Some things to check.

No tune, nothing plugged in, no aftermarket equipment, all stock.
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#28 (permalink) Old 11-23-2012, 06:24 PM
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A friend of mine had this happen to his SRT8. One day he went out and the battery was dead. Took it in, and they found nothing wrong. This happend again and then on the 3rd time, he took it to the dealership and threw the keys at them and said call me when the problem is fixed. After a couple of weeks, they called and they had a few questions. The first question was did he have a 2nd fob, and the answer was yes. The second was did he lock his doors, and the answer was yes. They then asked where he kept his fob's, well he kept one on his key ring, and the other one was left on one of those key racks people have to hang keys on. This one was kept just inside the house from where the car was parked in the garage. They said, there is your problem. The car and fob are communicating and when the car is not used for a long period of time, 3-4 days, the battery would go dead.

He moved the fob to the other side of the house, and so far no problems. Battery has not died since.

Think of how close to the car you are keeping your fobs as this may be the problem if your battery has died.

Scotte
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#29 (permalink) Old 11-23-2012, 10:50 PM
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Battery drain

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Originally Posted by scotte2010 View Post
A friend of mine had this happen to his SRT8. One day he went out and the battery was dead. Took it in, and they found nothing wrong. This happend again and then on the 3rd time, he took it to the dealership and threw the keys at them and said call me when the problem is fixed. After a couple of weeks, they called and they had a few questions. The first question was did he have a 2nd fob, and the answer was yes. The second was did he lock his doors, and the answer was yes. They then asked where he kept his fob's, well he kept one on his key ring, and the other one was left on one of those key racks people have to hang keys on. This one was kept just inside the house from where the car was parked in the garage. They said, there is your problem. The car and fob are communicating and when the car is not used for a long period of time, 3-4 days, the battery would go dead.

He moved the fob to the other side of the house, and so far no problems. Battery has not died since.

Think of how close to the car you are keeping your fobs as this may be the problem if your battery has died.

Scotte

Very interesting.
I guess my spare fob may be 40 ft. from my car. I do not lock the doors or use the alarm any more since ny first dead battery.
I'm going to try this. Thanks.
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#30 (permalink) Old 11-24-2012, 09:06 AM
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Quote:
Originally Posted by scotte2010 View Post
A friend of mine had this happen to his SRT8. One day he went out and the battery was dead. Took it in, and they found nothing wrong. This happend again and then on the 3rd time, he took it to the dealership and threw the keys at them and said call me when the problem is fixed. After a couple of weeks, they called and they had a few questions. The first question was did he have a 2nd fob, and the answer was yes. The second was did he lock his doors, and the answer was yes. They then asked where he kept his fob's, well he kept one on his key ring, and the other one was left on one of those key racks people have to hang keys on. This one was kept just inside the house from where the car was parked in the garage. They said, there is your problem. The car and fob are communicating and when the car is not used for a long period of time, 3-4 days, the battery would go dead.

He moved the fob to the other side of the house, and so far no problems. Battery has not died since.

Think of how close to the car you are keeping your fobs as this may be the problem if your battery has died.

Scotte
If this is true, you should get post of the month!!! My 10 R/T only has 9600 miles on it so I don't drive it to often. A while back I went out and the battery was dead. I figured I may have been playing the "tunes" too much. After sitting about three to four days, it doesn't want to turn over as fast as it does if it sits for just one day. Since it starts, I didn't really care. This is where your theory gets interesting. I leave my key fob in the car all the time and the other is on a nail about 20' from the car. Based on what you are saying, the one in the car is REALLY a bad idea, because it will run the battery down, and the one on the wall, should also be moved. I will try this an see what happens.

Very good post!!!
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