Quote:
Originally Posted by trader4
I missed the part that the battery goes back from 9.2V to 12.5V
after just running it for 1 min, then turning it off. I thought it was
while it was running. So, yes, that makes no sense. Are you
confident in that meter? Where exactly are you testing it? Right
on the battery terminals? Battery cable connectors at the battery?
Are they tight, no corrosion?
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Yes - I am testing it right at the battery in the trunk. I've checked for tightness and for corrosion and both are good. I'm pretty confident my meter is correct. When I check my other cars, it read 12.7V.
Quote:
Originally Posted by trader4
The 12.75 to 12.68 overnight with the battery cables disconnected
sounds normal. Starting at 12.5V, going to 12.3V overnight sounds
like a parasitic load or a bad battery. More likely a bad battery,
because 12.5V is already a battery discharged by about 10%.
But then you had the battery tested. Did they do a load test?
I'd take the battery someplace else, as long as you can get it
tested for free.
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AAP have a machine that they used to connect to the battery and it will print out a report stating whether the battery is good or bad. According to that machine, it's good. I think they also did a load test as well.