11Volts is low and an indication of a troubled charging system and or battery
charge battery and check if on the border replace check battery terminals
start engine and check battery volts if below 13, 5 suspect a bad alternator or troubled charging system and have to be checked
do not leave low battery or border line battery with a new alternator as it will for sure corrupt and ruin the alternator
good luck
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Monday, January 25th, 2010 AT 6:16 PM