What size resistor do I need? Answered
Hi, I have a Wilson Sleek antenna booster that runs on car battery power, 12VDC and draws 2.5A. I would like to power it away from the vehicle using a 19.2VDC Craftsman drill battery that measures 21.7VDC at the terminals, fully charged. What size resistor installed in series with the Sleek will allow it to safely operate from the Craftsman battery?