gb.battery.voltage
From Gamebuino Wiki
Description
Gives the measured voltage of the battery expressed in millivolts (mV).
Syntax
gb.frameDurationMicros
Parameters
none
Returns
unsigned long: time spend to render the last frame in microseconds. It includes time consumed by the library to refresh the screen, update the sound, backlight, battery monitor, etc.
Example
The battery_logger example logs the battery voltage to the micro SD card every 10 minutes. It's provided by default on the SD card and is named BAT-LOG.HEX
Here is a typical voltage evolution during battery discharge (with no sound and no backlight):
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