To be more specific, I can't answer that. What I do know is that I'd stick with the charger that comes with the GN, or at the least, a more recent smartphone charger than the one that came with the OG. A Christmas present to yourself is OK

 

I use this in my car and it works fine.

http://www.amazon.com/Motorola-Vehi...Q9CA/ref=sr_1_1?ie=UTF8&qid=1324916246&sr=8-1

 

It's fine to use your Droid charger. You will note that the output of the Droid a/c charger is 5 V at 1 A just like the Nexus.

 

My D1 charger is only 750 mA. I use mine on the GNex. Works fine.