I know the standard usb ports limit to 500ma in most cases, but with the appropriate cable and connections, the nook will request the higher USB ratings, 1.9 amps on my stock wall wart and stock power cord.
Are car chargers built with usb sockets limited to some usb spec of 2 amps or so?
A simple 5 volt regulator in a car socket could theoretically supply 10-30 amps depending on its fusing.
What I am wondering is say, a gell cell or NiCd pack with high current ability could be connected to the nook, using the high power usb pins enabled to on would be safe, or would the Nook be expecting a limited power source.
I'm afraid if i connect a 5v 10A plus source like above, and there is no self current limiting, I might blow an internal fuse or input resistor.
I want to take the thing on a trip, and was hoping a battery pack in my bag with a female USB jack (the center two pins shorted, and the stock cable) would be able to charge the unit when away from both the AC and car power.
P.S. On a related note, do airlines now have 120 volt outlets at all seats so I could use my nook charger?