Quote:
Originally Posted by trader4
First, we have to assume that your meter is accurate. If so, then
12.5V the night before is already a problem. A fully charged battery
should be ~12.65, so it's slightly low. Worse, the next morning,
12.3V is not still good. That's a battery that's about 70% charged.
You put a small load on it and it dropped to 9.6V, which sounds like
a battery that's not charged very much at all. Coud be a bad battery,
but then you said it was tested, was it load tested?
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I guess this is where I'm confused since once I start the car and let it run for one minute, the battery would read 12.50V after turning the car off and letting it sit again. Does it make sense after letting the car run for 1 minute that the battery will jump from 9.2V to 12.5V again. It's odd or maybe I just don't understand enough about batteries. Plus - how am I able to start the car with just 9.2V reading on the voltmeter? That is also odd in itself.
[/QUOTE] Testing it once and seeing no parasitic drain isn't conclusive. Some
of them are sporadic and you might not have caught it. You could
try measuring the battery at night, then leaving it disconnected
over night, see what it reads then.[/QUOTE]
I have done the parasitic test several times already and it shows 10mA everytime after the X5 is in sleep mode. I have also done the measuring battery overnight with it disconnected. It was from 12.75V to 12.68V the next morning with it disconnected. I've done several alternator test and all indication is that my alternator is fine. We drive this car all the time so it should be sufficiently charged at all times. I guess I could try to buy a new battery just to rule out the battery issue but I hate to waste over $200 and it not being the problem. The battery is only 6 months old.
Thank you all for all the advice so far.