[AT&T Samsung Galaxy Note I717] G8351427:
I have been struggling with this problem since I got the phone a week ago. The funny thing is that I already went through this with my Nexus One, lo those many years ago. So, I already knew that I had to buy chargers that had the data pins shorted, and have done since then. I did cheat once and bought a Griffin dual port USB mini charger that sits flush in the socket and looks like your car was made for USB charging, but I took it apart and shorted the pins myself.

My most recent charger is a TuneLink Android from NewPotato. It is basically a Bluetooth adapter that hooks into your AUX port so that you can just BT your music to your car stereo, and has a high-capacity charging port built-in.

I have not had any problems on my other HTC phones with my hacked up Griffin charger or my TuneLunk until I got this Note.

I have been scouring for all the info I can find, even calling up Sammy (who recommended I use the CAD300UBE, which I in a photo of the label reads 700mA output) and I cannot find any info that says "This charger works" until I came across this thread where someone recommended a Motorola charger that they tested successfully. As it turns out, my brother bought a stash of these a year ago to have on hand and gave me one. I tested it out, and sure enough, it charge while navigating, playing music, etc. I am not keen to open it up to test the current draw, but here is the kicker: the label says it is not even rated at a full amp, but only 950mA. close enough, but definitely less than all my other high capacity chargers.

I did some testing on my old chargers, similar to what the OP did and learned that the Note simply won't try to draw more current, even if the charger will supply it. Based on the other posts referring to the different charger number designations you can find, it seems like the Note is using some logic to identify the chargers. What I do not get is how the Note is identifying this one-year old charger as high capacity, and not my other chargers that follow the USB spec by shorting the data pins together.

As an interesting side note, I called up NewPotato to ask them about this and, while I did not get the answer to my problem, I did get some insider info on how this whole charging thing works. I happened to get the charging circuit engineer on the phone who explained to me that their testing showed that most Android phones send a voltage up one side of the data line and look for it on the other; this is how they can determine the configuration of the charger. The engineer also explained to me that the Apple and Android versions of their charger are nearly identical, except that they omit the Apple© chip they have to purchase to make their charger Apple certified.

I am not an expert on Apple devices, but it might stand to reason that the 6 identifier that others have seen is a result of the chip that Apple put in between the data lines to identify their chargers. Since my Android© version of the charger has no such chip, the Note cannot tell what to make of the thing.

So, after all of this, I have a charger that works, but I still don't know why. Does anyone know how Samsung is identifying these chargers? Has anyone been able to determine what the 6 designation means and how the Note comes up with that number?