Best part - perfectly adequate

Have purchased the product, I will use my Galaxy S2 from time to time as Navi.
The retractable cord works well. If you want to have no tense cable, simply pull on the cord to make it pinch evtl.in the ventilation gap, so that no one remains hanging when switching the cable.
The charge current is 500mA - loud sticker. The original 700mA.
When plugging a red LED to indicate: power there!
I have tested it on a range of 150 Km.
The mobile phone has been previously charged to 100% with a power adapter.
At the start of the navigation I have connected the car charger cable.
The battery charge indicator remained throughout the journey to 100%. Thus, the charge current is sufficiently dimensioned.
By pressing a button just leave the cable and move it from the glove compartment, until the next use.
Conclusion: Very convenient and practical solution, the mobile phone to provide traveling in the car with enough power!