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      09-13-2017, 01:03 PM   #23
houtan
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Drives: 2011 135i
Join Date: Jun 2013
Location: socal

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2011 135i  [9.85]
Ok, so i just put the voltmeter to the battery. It has been five to six days since i checked it last, so it was 12.06 at last check, and now it is at 11.79. Not sure if that means anything, but some online searching shows a battery below 11.88 is fully discharged. Per this page: http://www.aa1car.com/library/battery_runs_down.htm

I was also reading that the charging system needs to get some sort of volt reading from the battery to determine what type of current to send to the battery, and if it doesn't get anything the system will stop charging the battery. Is that true?

I will hook the battery up to my charger for a day before taking it to get load tested. I believe it should be fully charged before getting tested for an accurate reading, is that correct?

Last edited by houtan; 09-13-2017 at 01:13 PM..
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