After I sometimes missed when traveling a 2 charged cell phone battery, I've just bought such and, subsequently, this battery charger. The device itself is technically correct and the supplied small power supplies are very practical. What the description with the technical details on the Amazon website much missing is an indication, the maximum size cell phone batteries with this device can be charged. In my 5.8 "cell phone battery with dimensions 6x8 cm The machine did not work. The battery is simply too great for this device. Basically 5 star, due to lack of detailed description of the withdrawal of stars.