I bought the Power Tube to my smartphone to provide a longer service life and I have to say that I am completely satisfied. The Power Tube is very small and portable, making it possible the smartphone in your pocket once fully charge. The device is while charging continue normal use and behaves as if it would charge it to the socket. The only thing that has struck me so far, that the battery is quite becomes warm during the charging process when the display is still lit up. But this had so far this by increasing neither affect the battery still on my smartphone and is probably quite simply the power output of the battery by using the device. The chic metal Design of Power Tubes is very attractive and it is also good in the hand / pocket. I also like the Desgin the charging LED located at the head of the Power Tubes and is hidden behind a round, white cover.
What is not quite as convenient, the fact is that you really can charge the Power Tube with the supplied adapters only to a USB port. If you use the Power-Tube to travel and not have a laptop / netbook has this can be problematic.
All in all, I am fully satisfied with the Power Tube and can recommend it highly to all looking for recharging mobile for your mobile phone / smartphone
