Exilaus: I actually have one of those car adapters. It did not work in the car - it lights up, but I don't get charging on my EKEN. Maybe a bad cable - it's very thin and cheap. Even if it worked, there is no way to plug it into my LIPO battery. My battery takes a standard 5.5x2.5" round plug, not a car cigarette lighter jack. It might be possible to take the thing apart and solder a wire in place of the cigarette lighter adapter, but I don't know how to solder and I would be concerned about getting the polarity wrong.The issue I'm raising is whether 12v is within spec for the Eken external power jack. Some time ago, someone posted (maybe on the earlier email forum) that they were using a 12v ac adapter without any problem - I was wondering if anyone had done that for any length of time without problems?Probably risky to try it. Maybe I'll get some courage and take that cheap car adapter apart and see if I can make a voltage adjustment device. I'm sure it won't be very efficient, as the car adapter is very cheap.