are already charged or discharging, 'n/a' can be displayed (or
'unknown', if the status is not known).
+AUTHENTIC - indicates the power supply (battery or charger) connected
+to the platform is authentic(1) or non authentic(0).
+
HEALTH - represents health of the battery, values corresponds to
POWER_SUPPLY_HEALTH_*, defined in battery.h.
relative, time-based measurements.
CONSTANT_CHARGE_CURRENT - constant charge current programmed by charger.
+CONSTANT_CHARGE_CURRENT_MAX - maximum charge current supported by the
+power supply object.
CONSTANT_CHARGE_VOLTAGE - constant charge voltage programmed by charger.
+CONSTANT_CHARGE_VOLTAGE_MAX - maximum charge voltage supported by the
+power supply object.
ENERGY_FULL, ENERGY_EMPTY - same as above but for energy.