Meet the Omni Smart Case for MacBooks: an interesting case that brings more ports to your MacBook and extends your laptop’s battery life. It supports passthrough charging via USB-C. You also get USB 3.0 and HDMI ports in addition to a USB-C port.
The Omni Smart Case adds up to 9 hours of battery life to your MacBook. It is lightweight and keeps your laptop safe from accidents. The product is expected to ship starting July for as low as $149 (early bird pricing).[where to get it]