Before I get into this, I'll preface with YMMV but this fixed my battery issue (thus far) and I'll continue to keep an eye and update this thread as the days go on.
My battery charge level constantly varied between 12-14.3 and jumped erratically all around there. Twice it took to tries to start engine and came up with red battery dash light. 2 nights ago the science began...
Controls:
- My fobs and digital key in Faraday bags, and inside a faraday box. I tested this and no signal is getting out of the double wrap (didn't even try single wrap, to avoid variables)
- Auto-stop start is disabled (to further isolate possible issues)
Variables:
- Amount of time vehicles sat between being driven
- Distance driven, and traffic conditions
- Probably more that I'm not thinking of at the moment
I first tested both the main battery and Aux battery with multimeter (sorry no pics, as doing this solo required more hands than I was given.)
- Main battery: 12.01 - 12.04
- Aux battery: 12.13
First experiment (only thus far)
- Used NOCO Genius10 charger to charge both AGM batteries and allowed it to complete an optimization cycle. (12 hours for both, approx.)
Results (posted)
- Main Battery charged to 14.77
- AUX Battery charged to 13.38
I spent the day driving around with mix of short errands and longer drives my observation:
- Battery no longer fluctuated wildly and instead maintained charge, with only the slightest of deviations. As the battery settled throughout the day, I found it maintained 14.4 and no dash lights or any problems whatsoever.
I'll continue to test battery levels daily and if I see declining levels, I will repair both batteries and test that.
Notes: The aux battery negative terminal showed signs of corrosion which is extremely odd. It wasn't enough to clean but obvious signs of pitting.
Hopefully this helps some of you.
My battery charge level constantly varied between 12-14.3 and jumped erratically all around there. Twice it took to tries to start engine and came up with red battery dash light. 2 nights ago the science began...
Controls:
- My fobs and digital key in Faraday bags, and inside a faraday box. I tested this and no signal is getting out of the double wrap (didn't even try single wrap, to avoid variables)
- Auto-stop start is disabled (to further isolate possible issues)
Variables:
- Amount of time vehicles sat between being driven
- Distance driven, and traffic conditions
- Probably more that I'm not thinking of at the moment
I first tested both the main battery and Aux battery with multimeter (sorry no pics, as doing this solo required more hands than I was given.)
- Main battery: 12.01 - 12.04
- Aux battery: 12.13
First experiment (only thus far)
- Used NOCO Genius10 charger to charge both AGM batteries and allowed it to complete an optimization cycle. (12 hours for both, approx.)
Results (posted)
- Main Battery charged to 14.77
- AUX Battery charged to 13.38
I spent the day driving around with mix of short errands and longer drives my observation:
- Battery no longer fluctuated wildly and instead maintained charge, with only the slightest of deviations. As the battery settled throughout the day, I found it maintained 14.4 and no dash lights or any problems whatsoever.
I'll continue to test battery levels daily and if I see declining levels, I will repair both batteries and test that.
Notes: The aux battery negative terminal showed signs of corrosion which is extremely odd. It wasn't enough to clean but obvious signs of pitting.
Hopefully this helps some of you.
Attachments
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Multimeter - AUX.webp240.2 KB · Views: 46
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Multimeter-Main.webp232.4 KB · Views: 46
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Charging - AUX.webp205.3 KB · Views: 50
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Charging - Main (low).webp285.5 KB · Views: 51
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First Drive after Charge.webp144 KB · Views: 50
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Original Voltage Swing - After leaving dealer.webp79.4 KB · Views: 47
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Original Voltage Swing - 2.webp37.6 KB · Views: 43
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Original Voltage Swing 3.webp41 KB · Views: 44
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