I have this charger a few months in operation. Since then I have them and a Fatboy charging pillow, I invite my Lumia only about. It is very convenient because I use my cell phone if someone calls or writes, just pick it up and can take to the sofa, without any time to draw a cable and connect it again to have. A star deduction I admit, because the Lumia 820 the cover is relatively difficult to remove. This charger is even slightly thicker that this is even more difficult to remove. However, you do not have the so often do, which I can therefore live well.