Android - determine the charging voltage

Question

I want to find out the value of the charging voltage for my Android device. Is there a way in Android to somehow get this value programmatically?

Answer 1

The USB voltage specification is nominally 5 volts. If you monitor the voltage manually the current available to the device can vary from 5.5 volts down to 4.5 volts depending on the charger and cable wire diameter and length.

I presume that the internal charge control chipset watches the voltage available and resistance across the wiring to limit the possible current it can pull from the line.

As far as I know, this information does not exist in the android source.