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General VW Discussion This is a place for General VW topics (the company, not your vehicle). General topics about a specific vehicle should be posted in the General TDI Dicussion Forum sections for that vehicle platform. A4, A3 & B4, B5, etc.

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Old April 22nd, 2012, 01:38   #16
Jack Frost
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Quote:
Originally Posted by 2004Nick View Post
I think the old saw about the concrete is simply that a cement slab is OFTEN COLDER that the ambient air temp so the battery temp is morelikely closer to the slab temperature.
There may be a grain of truth. At one time, cellars were cold and, dank and ill-ventilated if they were at all. It is possible that a battery sitting on a concrete cellar floor suffered because the electrolyte became stratified inside the battery and would not mix.
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Old April 22nd, 2012, 06:08   #17
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Is this battery installed or just stored?

Installed. If it sets for more than 3 days without running it will be dead. I have no aftermarket gagets installed.
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Old April 22nd, 2012, 06:45   #18
2004Nick
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Jack Frost-----yes of course. But more likely the battery is just sulfated badly
(worn out) to the extent that it just will not take much of a charge and thus only
seems to be discharging but in reality did'nt have much of a charge to start with.
Sulfation is what kills most batteries and is caused by lead sulfate chrystalls forming
on the positve plates which forms aninsulating crust which interfers with the chemical
reaction which is how batteries WORK! this "sulfation" is usually caused by the battery
bing left sitting around in a discharged or partly discharged state. This is why solar
modules are worth their weight in gold by providing a trickle charge to keep batteries
alive. Any battery or bank of batteries that does NOT have at least a small solar panel
tirckle charging it will for sure have a much shorter life span. This I know for sure.
Solarnicky
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Old April 22nd, 2012, 08:59   #19
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Another grain of truth - batteries left on a cement floor tend to become forgotton and self discharge until they become damaged.


Proof: Batteries left on the kitchen table will never sulfate or experience any damage at all
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Old April 22nd, 2012, 16:24   #20
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Quote:
Originally Posted by 2004Nick View Post
Jack Frost-----yes of course. But more likely the battery is just sulfated badly
(worn out) to the extent that it just will not take much of a charge and thus only
seems to be discharging but in reality did'nt have much of a charge to start with.
Sulfation is what kills most batteries and is caused by lead sulfate chrystalls forming
on the positve plates which forms aninsulating crust which interfers with the chemical
reaction which is how batteries WORK! this "sulfation" is usually caused by the battery
bing left sitting around in a discharged or partly discharged state. This is why solar
modules are worth their weight in gold by providing a trickle charge to keep batteries
alive. Any battery or bank of batteries that does NOT have at least a small solar panel
tirckle charging it will for sure have a much shorter life span. This I know for sure.
Solarnicky
The battery is only 1 year old...
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Old April 22nd, 2012, 16:57   #21
whitedog
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Quote:
Originally Posted by Jack Frost View Post
Another grain of truth - batteries left on a cement floor tend to become forgotton and self discharge until they become damaged.


Proof: Batteries left on the kitchen table will never sulfate or experience any damage at all
The husband that put it on the kitchen table may not come away undamaged.
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Old April 23rd, 2012, 06:43   #22
2004Nick
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Does'nt MATTER how OLD it is---it's a question of CARE. Any lead acid battery that is
just IGNORED (not trickle charged at least will have a very short life span indeed. If you
need a battery that can be ignored between charges try a gel-cell. They seem to hold up
much better in these conditions. Don't leak either. Just cost more! LOL
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Old April 24th, 2012, 04:20   #23
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Quote:
Originally Posted by 2004Nick View Post
Does'nt MATTER how OLD it is---it's a question of CARE. Any lead acid battery that is
just IGNORED (not trickle charged at least will have a very short life span indeed. If you
need a battery that can be ignored between charges try a gel-cell. They seem to hold up
much better in these conditions. Don't leak either. Just cost more! LOL
Seems to me that 3 days sitting should not cause a battery to discharge to the point that it will not start my Jetta. Something has to be draining that battery.
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Old April 24th, 2012, 17:12   #24
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You should do two things:

Fully charge the battery and have it load tested.
Check the car for parasitic drain.
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Old April 24th, 2012, 19:08   #25
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You should do two things:

Fully charge the battery and have it load tested.
Check the car for parasitic drain.
Well, I've been down this road with the previous battery that was only 2 years old. I bought the car used so I didn't know the history of the battery and assumed it was abused. There is a constant amp draw but I con't recall exactly what it was. I'll recheck and post it here so we can compare. Like I said, I have no aftermarket divices installed.
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Old April 30th, 2012, 06:24   #26
2004Nick
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Easy to test for "phantom " loads. Connect a multimeter on amps or milliamps scale
between either battery post and the (disconnected ) cable. That will tell the story.
Maybe there is a short somewhere.
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Old April 30th, 2012, 06:29   #27
2004Nick
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Wink "Parasitic or "phantom" loads

Quote:
Originally Posted by Cliffman View Post
Well, I've been down this road with the previous battery that was only 2 years old. I bought the car used so I didn't know the history of the battery and assumed it was abused. There is a constant amp draw but I con't recall exactly what it was. I'll recheck and post it here so we can compare. Like I said, I have no aftermarket divices installed.
If as you say you have a "constant amp draw, there's your answer-----just like
a bank account if you have "draws" you must arrange for a "deposit". If your
battery won't hold a charge DISCONNECTED then you obviously have a BATTERY
problem. Everybody blames the poor BATTERY!!!!!!
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