Hello guys, I had my A6 4B repaired the other day (gear belt, coupling, brakes renewed), but apparently my battery was jammed off so that it was empty the next day and I could not start the car. Since I am not an ADAC member I had to call acquaintances who then arrived quite late. So that did not happen again I searched for start-up devices on ebay and found the following:http://www.ebay.de/itm/251577174681?… according to my researches it is u m the PoweAll device distributed in the USA: http://www.youtube.com/results?search_query=powerall My question is now whether it’s worth buying such a thing or not? I think it’s all coming from China anyway. Is it useful?