I do not know where to find the service after sales for this product and do not know if it is guaranteed, at least 1 year, like every other article ...? I loved this charger, very very convenient when weekend without socket near to recharge your smartphone! I am served me 6 times in total since May 2013 .... and there bim the cable seems to have laché me, it no longer works! what to do? It works certe with another cable but very, too slowly, he puts a 5h 1h charge my smartphone against the original cable ... I am disappointed that it did not work any longer.