I have tried:
Galaxy Charging Current *Lite*, which gives a n/a and 0 reading.
Terminal Emulator, with code "cat /sys/class/power_supply/battery/current_now" returns that the file does not exist or something similar.
Battery Charge Source Current, which read unknown charger and 0.
The only app that seems to half-heartedly work is Battery Monitor Widget which sometimes gives me a reading but I feel it's inaccurate due to how the refresh does not update when told to, it updates very slow/on it's own and reports seemingly random amperage.
I understand that a "data" cable limits charging to .5A and a "charging" cable charges a.9A, also that the Galaxy S3 max pull/draw is .9A.
My other question is how can I tell if I am using a "data" cable or a "charging" cable, especially since I can't seem to measure charging amps.
So I'm basically trying to get at:
1. Why won't my device show charging amperage with the above apps, and if there is another app/method I should try?
2. How can I tell with my current situation which of my cables are "data" cables and which are "charging" cables.