accessoires

In my golf cart I have hooked up a 12 volt cigarette lighter to two 6 volt batteries in series. I am able two run a 12 volt air compressor but when I put in a USB adapter in to charge my cell phone it burns the adapter out immediately. What am I doing wrong?

Hi everyone. I've been surfing around and got interested in EV. I'm now looking into the possibility of converting a car in an EV, and am considering the peugeot 406 coupé, which in the future will turnout to be a rememberable "classic". I've done some calculations, and everything looks ok...