The principle of this charger is great and absolutely practical. Power also of the perceived quality forth a good impression. However you have to watch what device you connect to it. I have a Galaxy SIII and the adapter delivers simply not enough juice to the equipment in use, such as Navi, to supply sufficient. The smartphone is connected Unloads while. Nor is a defect, as I have already tested two identical chargers. The 500mA is to deliver it, I do not reach the charger, otherwise it would not be possible that the S3 discharges in Navigation mode.
But for less than 7 euros, thanks to the ingenious construction, denoch 3Sterne. Those who have a less power hungry smartphone, can safely access!
