Here's the OEM car charger. I have one. It says it's "5V=2A" on the side of it.
I've attached pictures, so that you who might know more about these matters than me might discuss. I took the pictures with my Touch Pro, trying to get as good a shot of the text as possible. So there are 2 pics, because the light glare and roundness of the charger didn't make taking the pictures easy for an amateur like me.
When using
nuePower to view how the car charger is performing, I've never seen it ever go above about 750mA, which is .75A. But perhaps the discharge might play a role in that, I've always got various things running.