Yes, it's definitely the cable, it works all the time without problems with the cable of my Kindle, but with none of my other cables. Btw. I bought a pack of cables from amazon and none of them works (I hope it's no problem if I post this link? I just post it so nobody buys it, because it doesn't work with the charger
http://www.amazon.de/Premium-verschi...pUvbUpU3077738). Has somebody a recommendation for a cable that works or something I should look for when buying a cable? I want a 1ft/0,3m cable with which I can charge both devices... why is it so hard to find one. -.-