Quote:
Originally Posted by abarthch
I forgot to mention that the first time I got a green light was after about 4 hours of continuous charging (or maybe not exactly continuous, when you consider that the charging was interrupted every minute for a few seconds). So the battery seems to be doing fine so far.
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Little details like that make a difference.
That's 12 volt, RS-232 serial (similar to a COM port - back in the days when computers had COM ports).
It is unlikely that the Kindle's nano-powered CMOS port can pull the signal line to zero (unable to sink enough current).
The Kindle's port evidently can tolerate 3v3 signal levels, other people have used that rather than 1v8 - it is just that I can't recommend it.
(The hardware reference manual is silent on the subject.)