Basic/Gray/M5GO Battery

#include "M5Unified.h"

void setup()
{
    auto cfg = M5.config();
    M5.begin(cfg);
    M5.Display.setTextDatum(middle_center);
    M5.Display.setTextColor(TFT_BLACK);
    M5.Display.setTextFont(&fonts::Orbitron_Light_24);
    M5.Display.setTextSize(1);
}

void loop()
{
    M5.Display.clear(TFT_WHITE);
    
    bool isCharging = M5.Power.isCharging();
    int vol_per = M5.Power.getBatteryLevel();

    M5.Display.setCursor(0, 30);
    M5.Display.printf("Charging: %s \n\n", isCharging ? "Yes" : "No");
    M5.Display.setCursor(0, 60);
    M5.Display.printf("BAT: %d%%", vol_per);
    delay(5000);
}