How Do Powered Trailer Jacks Draw Power, From Battery
The Ultra-Fab Electric A-Frame Jack # UF38-944037 that you referenced would simply plug into the 7-way at the rear of your tow vehicle and would draw the power needed for the jack to work from the vehicle battery. Most all other tongue jacks are hard wired to the trailer battery directly. A good example is the Lippert # LC285318 tongue jack rated for 3500 pounds.
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