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Discussion Starter · #1 ·
I parked the car last night around 8:30pm with about 58% capacity in the battery. This morning, I start the car up and on the dash it shows charging system malfunction and battery level dropped to 3% ! Has anyone had this happen to them before? I'm going to charge it up to about 10-15%, head to a DC charger and see what happens tonight.

I checked my dashcam to see if maybe that was running all night causing a drain? No error messages in the my Audi app either. That warning below is low battery, please charge.

This is the main battery, not the 12v battery.
 

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Discussion Starter · #2 ·
So, about 90 minutes later I decided I'd take the car to a DC charger to get it to 80%. Unplug the wallbox, and put the car in reverse. All of a sudden it now shows as 67% battery. I'm going to count that as a software bug.
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I would not assume it’s a bug, the car may have a bad cell/module or a wonky battery management board. Definitely worth having a full diagnostic at dealer.
 
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