There are plenty of boring power banks that let you keep your smartphone charged on-the-go. The Lightsaber 6000mAh Power Bank is made with Star Wars fans in mind. It has enough juice to charge your smartphone and other USB powered devices. Its USB port has an output of 5V@2A.
This power bank comes with a convenient laser pointer. It can be recharged via its Micro-USB slot. This is an officially authorized Star Wars gadget. You can find it here.