We currently own a Mini One D.
Unfortunately, the Mini only has 1 USB charging port. Also, there is no car sigarette lighter port, so we cannot just simply purchase a charger for it with 2 USB ports (like this: minilover DOT be/nl/accessoires/multimedia/dubbele-usb-lader)
We tried a USB Hub so that we can split it into multiple ports, but this didn't work either.
Any suggestions on how to create an additional USB charging port (USB A or C are both fine), so that both the driver and one passenger can charge their device?