We've had a bit of chatter here recently about FuelRods, the small battery backups that now have kiosks scattered all over Disney World. When you are at Disney, and purchase a FuelRod for the first time, the cost is $30. Disney's page about FuelRods When you purchase a FuelRod directly from the company's website, it is $20 - and you can exchange it at Disney World, and airports, (and any other location that has a FuelRod kiosk) just the same as the ones you buy at Disney for $10 more. FuelRod's website We purchased 2 of them (for $40) and have been very pleased. They came with a complete connection kit to charge either Apple iOS devices, or most Android devices (no USB-C connector FYI) and you can also just recharge them yourself if you want to. If you need to swap out your FuelRods while you are out and about at Disney World, locate your nearest kiosk, and follow the instructions, and you should have a fully-charged FuelRod in your hand in mere moments. I personally love this idea - I don't have to carry a bunch of extra battery packs, I don't have to worry about finding spots to plug in and charge, and it's super convenient. Hope this helps save a bit of money for those who have time to plan ahead!