Successful use possible

For a fixed installation on the bike I could not bring myself. Rather, I have built a Dynamoabzweigung, in which the device is connected on the primary side with laboratory plugs. On the secondary side, I could not use the supplied cable for Samsung smartphone. Instead, I have a Samsung PSU sacrificed and the Micro USB cable used, which included the necessary contact assignment for charging purposes. One can see from this that eventually something improvisation to achieve the functioning is required.
The technical characteristics totally convincing. When turned off the light charging in a timely manner is possible. When the light is at least one charge retention is possible.
A sensible use of course is only useful on longer bike rides because I first had one, albeit small installation effort