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Old 12-05-2011, 01:58 PM
ctuna ctuna is offline
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Location: usa
 
Join Date: Jan 2010
Posts: 2,385
Mein Auto: 325xi wagon
My battery is old an I got the battery warning once

I have been monitoring my voltage with a voltmeter and charging the battery
with a 2 amp setting . I can get it to charge up to 12.5 volts but but it will loose
voltage sometimes quite a bit overnight and if I leave it for a couple of days it will
be down around 11.8 so I am going to get a new one. ( its the original)
I would get your battery charged where ever you can then take a reading every morning
for awhile to establish some history on how well its holding charge or what your driving
habits are doing to it then adjust habits as necessary.

http://www.bawarec.ru/manuals/3er/e9...3er-e90-12.pdf

The above describes the intelligent battery charging system although at this point we might
call it the dumb battery system.

Last edited by ctuna; 12-05-2011 at 02:05 PM.
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