Parasitic Battery Drain Measured on 1990 Audi 100

PSD psdooley at verizon.net
Tue Jul 21 10:57:56 PDT 2015


Just curious, did the car start after 14 days?  That draw would kill the
average battery pretty quick.

-----Original Message-----
From: quattro [mailto:quattro-bounces at audifans.com] On Behalf Of mboucher70
hotmail.com
Sent: Tuesday, July 21, 2015 12:16 AM
To: quattro at audifans.com
Subject: Parasitic Battery Drain Measured on 1990 Audi 100


I've always noticed that my Audi's car battery ran down faster than other
cars when the car hadn't been driven for a while.  Two weeks ago I did
1000km of highway driving then parked it and didn't drive it for 14 days.
Yesterday after 14 days, I measured the voltage and it was down to about
11.5 volts.  


I decided to finally measure what the drain on the battery was, when the car
is just sitting parked.  And further, to see what was actually responsible
for that drain.  I did this by routing the battery through an ammeter. 
Results:  Total drain: just over 1/4 of an amp. 261 mA to be precise.




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