My first review, so I beg your indulgence in the formulation. I bought this charger to charge a second battery, independently from my phone can. So far everything is working properly, the battery is firmly seated in the device so that the device can also be operated on a normal wall socket without the battery falls out. The removal is nevertheless good and comfortable possible. Through the USB port, I can simultaneously or independently of the battery charge any other device with the appropriate cable, which makes the device even more useful. For the German grid - at least in my version - an adapter therein without adapter, the device can be used in the US. This had me a little confused at first, because the picture on the packaging two adapter shows a folded out but for Germany and one is for the US, the USA plug from the housing and is permanently installed. If the German adapter is plugged, the USA plug must be collapsed. The ability to use the device during a stay in the USA, has persuaded me to buy this product and I would definitely recommend him to my previous experiences. Although I can not say anything for operation in the US, but I am confident. Whether the charging time can be compared on the charger and the original cable, I have not checked.
