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billhuntersemail(at)gmail
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 Posted: Tue Nov 15, 2016 11:06 am Post subject: Automotive Electrical System Study |
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Hi All,
I finally got around to conducting the scientific study of the electrical draw of my car electrical system when the ignition switch is off.
Here is the results of this scientific study:
1999 Saturn 3.46 MA
2002 Saturn 2.02 MA
2007 Yukon 3.42 MA
The 1999 Saturn was the one I had the new battery die on last week. The battery was really dead (not mostly dead) after it sat at the airport for about 5 weeks. AutoZone determined that the 8 month old (new) battery had a bad cell and replaced it for FREE!!!
I ass-u-me that one cell going bad could reduce the capacity of the battery to the point where the interior lights would not even show any kind of life?!?!?
Anyhoo…THANKS AGAIN!!!
..
Cheers!!!
Bill Hunter
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nuckolls.bob(at)aeroelect
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| Posted: Wed Nov 16, 2016 5:14 am Post subject: Automotive Electrical System Study |
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At 01:05 PM 11/15/2016, you wrote:
| Quote: | Hi All,
I finally got around to conducting the scientific study of the electrical draw of my car electrical system when the ignition switch is off.
Here is the results of this scientific study:
1999 Saturn 3.46 MA
2002 Saturn 2.02 MA
2007 Yukon 3.42 MA
The 1999 Saturn was the one I had the new battery die on last week. The battery was really dead (not mostly dead) after it sat at the airport for about 5 weeks. AutoZone determined that the 8 month old (new) battery had a bad cell and replaced it for FREE!!!
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Interesting, thanks.
Went out and measured the cars in my driveway:
1987 GMC R1500 24 mA
1998 Saturn SL1 1.5 mA
2006 Kia Sedona 2.0 mA
| Quote: | | I ass-u-me that one cell going bad could reduce the capacity of the battery to the point where the interior lights would not even show any kind of life?!?!? |
Sure, if the cell went open . . . then it
doesn't matter how much snort is left in
the remaining cells.
The truck's parked demand on the
battery amounts to .024 x 24 x
30 = 17 a.h. or about 1/2 the battery's
capacity in a month. I probably need
to check that again, it seems excessive.
Oops, just remembered that I've got a
couple of chargers plugged into always
hot outlets . . . I'll bet that's where
most of the parked-drain is going.
Bob . . .
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billhuntersemail(at)gmail
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| Posted: Wed Nov 16, 2016 8:00 am Post subject: Automotive Electrical System Study |
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I forgot that one of my Saturns had a mobile charger plugged so that would add to the draw.
Bill Hunter
+1 408-464-1902
On Nov 16, 2016 05:46, "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote: | Quote: | At 01:05 PM 11/15/2016, you wrote:
| Quote: | Hi All,
I finally got around to conducting the scientific study of the electrical draw of my car electrical system when the ignition switch is off.
Here is the results of this scientific study:
1999 Saturn 3.46 MA
2002 Saturn 2.02 MA
2007 Yukon 3.42 MA
The 1999 Saturn was the one I had the new battery die on last week. The battery was really dead (not mostly dead) after it sat at the airport for about 5 weeks. AutoZone determined that the 8 month old (new) battery had a bad cell and replaced it for FREE!!!
|
Interesting, thanks.
Went out and measured the cars in my driveway:
1987 GMC R1500 24 mA
1998 Saturn SL1 1.5 mA
2006 Kia Sedona 2.0 mA
| Quote: | | I ass-u-me that one cell going bad could reduce the capacity of the battery to the point where the interior lights would not even show any kind of life?!?!? |
Sure, if the cell went open . . . then it
doesn't matter how much snort is left in
the remaining cells.
The truck's parked demand on the
battery amounts to .024 x 24 x
30 = 17 a.h. or about 1/2 the battery's
capacity in a month. I probably need
to check that again, it seems excessive.
Oops, just remembered that I've got a
couple of chargers plugged into always
hot outlets . . . I'll bet that's where
most of the parked-drain is going.
Bob . . .
|
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racerjerry
Joined: 15 Dec 2009
Posts: 202
Location: Deer Park, NY
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| Posted: Thu Nov 17, 2016 5:25 am Post subject: Re: Automotive Electrical System Study |
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| Quote: | | I ass-u-me that one cell going bad could reduce the capacity of the battery to the point where the interior lights would not even show any kind of life?!?!? |
It has been quite a while since I have had a wet cell battery in either car or airplane with removable caps that I could monitor with a hydrometer, BUT I seem to remember that when one cell of a 12 volt battery shorted (would not take a charge), you basically ended up with a 10 volt battery. The 10 volts was certainly enough to dimly illuminate 12/14 volt lamps, but never able to crank the starter.
Or am I full of crap.
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Jerry King |
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