I bought this one http://www.whitehorsegear.com/powerl...socket-18-inch , works great. I'm not sure about a $3 one, but maybe ....... the ones I found only have a 9" cord, I like the 18", gives me plenty to play with and put it in the bag, charging while I'm riding.
I have never seen in my life like this before! It's beautiful and unique.. Please give me idea of how much it cost?