According to signage on all FuelRod kiosks in the Magic Kingdom, Fuel Rod swaps will cost $3 starting on November 1st, 2019.
Since their arrival at Disney Parks, park guests have turned to countless trusted FuelRod kiosks for their first $30 FuelRod starter kit and enjoyed years of unlimited, free swapping once the battery ran out. In fact, the Disney Parks were one of the few remaining places where people could swap their FuelRods for free.
Many airports and other tourist destinations, including nearby theme parks like Universal, charge a nominal fee to swap your FuelRod. However, this change in policy for free swaps at Disney Parks is sure to be a major adjustment for many guests who rely on FuelRods to keep their devices charged during their day.