Understanding unexpected amp draw.
I have a 12v accessory plug socket that has a light on it and I was curious how much keeping it plugged in would affect my battery. (everything I read said it wasn't an issue, but curiosity sent me ch...
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Alternatively, if the LED light bothers you, you could always add in a simple switch on the + side of the wiring for that USB device. I know it is a very small draw but that is what I did when I added two dual port USB sockets in my trailer's bunk areas.
