Thread: What is this?
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  #9  
Old 12-22-2021, 07:22 PM
stellar stellar is offline
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Join Date: Jul 2006
Location: pittsburgh pa
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battery isolater. used to charge 2 batteries and if one goes dead from use without the machine running the other battery stays charged to start the machine. Often used on boats limos and cars running stereo without the car running

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