ir I was in a $2 shop yesterday and I noticed USB charges that fit in the cigarette lighter in cars. Their price was $3. My question is are they going to be safe for that price or should I follow the "If it is too good to be true" rule?
Try the same ciggy lighter power supply off a separate 12v supply and see how it goes. Lots of ground difference and other high frequency noise sources in a car.
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