I bought this charger for my mobile phone (Nokia Lumia 820) and be able to load the go. That works wonderfully. For maintenance: In my Opel Astra G, it sits a bit loose and slips like to get out even if you touch one of the cables, hanging in it. In the newer cars that I've checked the maintenance which is however no longer a problem. to the already frequently mentioned LED: Yes it is extremely bright and has also a very unpleasant tone. I do not know why but she even appears on the day. Especially bad is it, however, when it is dark outside. I have solved the by, I just stuck a piece of tape over it and the charger so reversed that the cables the LED stuck in cover. Now the lamp is no longer served their purpose. To The Store: It has enough power to load in my phone when navigating. Something I have not thought of at the beginning, however, is the size. If you want to use at a current A4 the 12V socket, which is located underneath the center armrest, then that's close. In the 12 V socket in the center console of the Opel Zafira Tourer, this charger is out to such an extent that interferes quite there when shifting. All in all a really pretty solid product is just something great.