I just tested the open circuit output voltage of the little 1 Amp AC charge=
r
that you get with the phone. It has a USB host socket so you can plug in
your USB cable directly.

The +5 V line is reading 5.10 volts
One data line is reading 2.70 volts.
The other data line is reading 2.00 volts.

A question: Since the data lines have to be set at a certain voltage (with
resistor voltage dividers), and the battery pack voltage will vary between
4.4 - 5.6 volts, how would I get a steady voltage on the data lines to tell
the iPhone to draw 1 Amp? Would I need to just stick a low power voltage
regulator at around 3.0 or 3.3 volts and create a divider from there?
--=20
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