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| D2 - Everything else Anything that doesnt fit elsewhere |
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#1
7th December 2012, 05:36 AM
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Battery drainage on cold days.
Well as the title states i have got some problems with my 2000 A8 draining these day's as the temperature creeps down towards -20C. I changed brushes and diodes on the generator + a new battery last year. But i'm starting to think that's it's something else draining now.
Is it anything particular on these cars that's known to break down and discharge the battery's? 
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#4
7th December 2012, 08:44 AM
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Quote:
 I'm sure the clever folk will be along shortly to tell you what effect temperature has on available current..... 
__________________
2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim. Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!).
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#5
7th December 2012, 08:59 AM
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Well i ordered a new AGM battery today, so let's hope that helps.
Just thought that it might be a known component failure problem that could cause this sort of problem on the D2. Know that the BMW 5 series from 2000 have problems with a control unit not going to "sleep mode" and draining the battery over night just because of the minus lead on the battery. So just wanted to ask  I haven't bothered measuring for any unwanted usage with the ignition on yet. But if the problems prolongs after changing battery something have to be wrong :P
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#6
7th December 2012, 03:24 PM
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if you can spare the car for a few days try disconnecting the negative when you get home [ so the battery is charged , check the voltage in the morning , then test again each day to see how fast it drops
I've done mine like that and once it got to 12.7 it hasn't dropped at all , so is good don't forget that the CCA quoted is at something like 20C ....and at -20C that is reduced by ....50% ! Last edited by oldnick; 7th December 2012 at 05:45 PM.
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