https://allears.net/2019/10/25/youll-have-to-pay-for-that-fuelrod-swap-in-disney-parks-soon/
Fuel Rods are portable battery chargers available across Walt Disney World to give your electronics a boost when the need arises. Sine they appeared in the Parks the initial purchase of the $30 FuelRod and accompanying charging cords came with free swaps to gain additional power throughout the day.
Sadly, and much to my dismay, free swaps will no longer be available after November 1st. To obtain a fresh and fully charged fuel rod guests will now have to fork over an additional $3.