One of Voltaic’s standard output cables. Conects any USB port to any Voltaic 3.5×1.1mm adapter (all the Voltaic phone adapters are this size).
Cable is male USB on one end, female 3.5mm x 1.1mm on the other end.
The barrel end of this cable fits the standard/original Nokia barrel. So, if you have a dynamo or solar device that only came with a few phone connectors including the Nokia, you can use this Voltaic cable in reverse to create a male USB connector output from your dynamo/solar charger device. You can then use a female-female USB connector to convert this male USB end of the cable to a standard USB port (note that for pin-out reasons, this solution will work for standard USB devices, and many smartphones & androids, but it will not be Apple compatible).