I use the charger to a Samsung S4 mini for several months and am very satisfied: - Power: I will regularly while driving both a navigation and a warning app running and now I have wg. Sunglasses brightness even on full blast. Nevertheless, the S4 mini while still loaded - Usability: the charger is ideally suited to the power port in my glove compartment. There I leave it always plugged. When entering the car already familiar, fast handles are: S4 mini plug into the holder compartment, pull out the cable to the USB connector and plug it in again to trade. Since the cable is very thin, it is not pinched. When getting out of the retractor mechanism also works with the felt 1000. Using as the whirlwind and with no problems - Small drawback: the spring for the inner contact of 12V connector is so strong that along with the usual vibrations in the car sometimes the contact is lost and I have to push in the charger again. That may the special interplay between female and male, and for me at this low price but acceptable.