umbrella car charger

Small microusb car charger could be useful for travelers.

To minimize the size to a small pen the connectors 2 located on lamella 3 with similar to umbrella open to expand mechanics.
Inside of the pen small phone like curvy wire 4 tipped with micro usb 5.

Even if this in not very robust connector, it could be small and light enough to carry in your duty journey bag.