Powerbank charging dock

Since I create some movies using my iPhones, I often need to use a power bank. To always have
a charged one available, I built this charging dock. The powerbanks ([this ones](https://amzn.to/33TSjBX)) have attached magnetic
usb cable ([this one](https://amzn.to/2JpdCSs)) so they automatically snap in place and get charged. The power is provided from a
usb hub ([this one](https://amzn.to/2UoJM78)).