Under the same conditions, this USB charger 3A "NOVAGO" allows me to maintain the charge of my smartphone.
I'm still a little disappointed because I had hoped 3A with that manage to charge the phone. But hey, if he can prevent it from discharging when it runs at full speed is not bad where the 4 stars of the note.
On the positive side it is true that it is small and discreet in my Peugeot 208.
It can also charge my Bluetooth headset Plantronics - Discovery 975.
Here I hope that this advice will be of service to someone.