Meet the Voltus: a portable device that provides your Mac with extra juice and lets you connect more devices to it. The new MacBook has a USB-C port, which means you will need adapters to connect your favorite devices to it. The Voltus has you covered though. It also charges your MacBook and two USB devices simultaneously.
Voltus can power your MacBook for up to 13 hours. You can connect flash drives, keyboards, smartphones, cameras, and printers to your machine using this hub. The product is getting funded on Kickstarter.