for trickle charging OK

Have a Samsung Galaxy S4 connected to it and used with appropriate holders for mobile phone and headset as Navi on the motorcycle. Since the mobile phone with GPS some amount of energy, has helped the charger to maintain the charge. Charging in this mode of operation was not carried out - but otherwise the phone for 3-4 hours would certainly have been empty. Plug was stuck firmly in my BMW R100RT only with additional measures (Velcro), but it is certainly on the something lined socket on the "moped". In sum, therefore, only 3 out of 5 star, could certainly be better for other purposes.