We use USB hubs to charge our DisneyBands and electronic devices on the dresser. However, we had the issue where there is not a USB or outlet on one side of the bed. Since I need a small fan to sleep (part noise/part to cool me down), I ensure we have a stateroom where my side of the bed has the outlet. I just bring a voltage adapter outlet and it has two extra USBs on it (never had an issue with this getting through security) so I can charge my phone and watch, plus use the fan. My wife only needs to charge her phone and watch, so I bought a portable charger and we are able to get through a 3-night cruise without needing to recharge it.