FuelGauge::getNormalizedSoC, getNormalizedSoC, FuelGauge.getNormalizedSoC
// PROTOTYPE float getNormalizedSoC()
Returns the State of Charge in percentage from 0-100% as a
float, normalized based on the charge voltage. Returns -1.0 if the fuel gauge cannot be read.
It may be easier to use
System.batteryCharge() instead of using
System.batteryCharge() uses the value in device diagnostics, which eventually uses