Assembly: the plug does not fit all, so I picked up the soldering iron, in hopes of a long stay of the headlamp on my bike, however, was done quickly and also ensures optimum contact (and theft difficulty).. The supplied bracket is a bit short and ensures a shadow of the mudguard. Whether one bothers everyone must know himself. A long strap could lead to oscillations of the luminous body and then interferes again.
The spotlight has a useful side light. The capacitor is charged even then when the wheel for hours standing around after a ride and you then actuates the switch! The capacitor will be fully charged when the lamp is off. I once measured it - the empty capacitor is fully charged in a few seconds, after which no further current flows to the lamp. I find this feature good!