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Is there anyone out there who is good with electrical circuits who can confirm that using a power inverter would draw more power than using a 120-volt mini-usb charger? I have a power inverter also which I bought hoping to charge a number of devices such as cellphones, mp3 players etc. Seems more versatile than buying a 12 volt adapter for each device but just wondering now too if it would drain the car battery faster.
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