My 1A car charger isn't recognized by my N9 as a wall charger but rather as a usb port on a computer. Then it says that the charger can't provide enough power.

My LG G2x and my fiance's Droid X2 both charge from it fine. Based on this thread here: http://talk.maemo.org/showthread.php?t=68409 It looks like I might have to short the data pins to get the N9 to recognize it as a dumb charger.

Anyone else run into this problem?

My N9 says my i7 PC can't provide enough power when I plug it into the USB port using the original Nokia cable. When I changed it to a shorter cable from another phone make it charges fine. This may not be applicable in your case but worth noting.

I ran into the same problem with my E7, my N900 charged from my 1A car charger, but my E7 kept thinking it was connected to a PC.

I just went on ebay and ordered a Nokia DC-6 car charger, its a 1.2A micro USB and workes perfect with my E7 and N9. I ordered two of them cheap just to have an extra.

I hade the same problem; I solved by opening the car charger and short-circuiting the two middle pins of the usb port.

Yep, this is the solution. From the specifications, a wall charger:
- must have the data pin shorted (or connected by a 200 Ohms resistor, which is more or less the same). This indicates that the phone can decide the current it draws without frying the motherboard of a poorly engineered pc.
- must not have the fifth pin shorted (with ground or 5V, I can't remember) (this pin is used to indicate host/master relation in micro usb connected devices, and shouldn't be used for a charger)

I shorted the two data pins (pins 2 and 3) on my charger and my N9 still won't charge from it; getting the same error.

Works like a dream here (I "fixed" my Belkin car charger a moment ago by shorting green and white wires).

using n810 usb cable , my e7 does not see the car charger and n900 complain it is too low ... the car charger is the one that was shiped along freerunner ...

i am in the process of making my own charger. ...

later