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Old 04-21-2017, 07:29 PM   #14
rexcramer
1997 Tip, 2018 Macan
 
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Join Date: Aug 2015
Location: Upland, CA
Posts: 1,338
Garage
I bought a cigarette lighter, USB charger thingy, it also has a digital volt readout that displays to a 10th of a volt. It is as accurate as my meter. I keep it plugged in most of the time. I think I paid +/-$8 on Amazon.
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