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      11-07-2012, 07:58 PM   #4
nate5ks
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Drives: 2006 BMW 330xi
Join Date: Nov 2011
Location: Jacksonville Beach, FL

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Could be the alternator also. A good batt should hover between 12.5 and 13.5 volts, 12 is on the low side. When the alternator is going bad, charging will be intermittent. Sometimes it will charge the battery and other times the car will start shutting itself off while you're driving. Trust me I know.