Battery not holding charge
06-05-2019, 08:13 AM
#2
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I had the same problem, even after buying a new battery. Got the battery testet and it turned out to be a bad battery. Got another new one on the guarentee, and now it works fine.
If battery turns out to be fine, then you have a short somewhere that is draining the battery. That can be harder to find.
If battery turns out to be fine, then you have a short somewhere that is draining the battery. That can be harder to find.
06-06-2019, 02:17 AM
#3
03-05-2020, 06:40 PM
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I have an 09 Q7 that was doing the same thing. Replace the battery and mysteriously overnight the batter would drain. Took it to one Audi dealership and they could not find it after keeping the car for 3 weeks. I took it to another Audi Dealership and they saw that when the doors were locked, the SAT Radio module would draw enough power throughout the night to kill a battery. I have not used the SAT radio in years the component just went bad. They created a fiber optic loop for the SAT radio and coded it out. So glade they found it. It was very frustrating. Took a few month.
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