uses 

  AndroidAPI.JNI.GraphicsContentViewText,

  AndroidAPI.JNI.JavaTypes,

  AndroidAPI.JNI.OS; 

function BatteryPercent(const aContext: JContext): Integer;

var

  filter: JIntentFilter;

  battery: JIntent;

  level, scale: Integer; 

begin 

  filter := TJIntentFilter.Create;

  filter.addAction(TJIntent.JavaClass.ACTION_BATTERY_CHANGED);

  battery := aContext.registerReceiver(NIL, filter);

  level := battery.getIntExtra(StringToJString('level'), -);

  scale := battery.getIntExtra(StringToJString('scale'), -);

  result := ( * level) div scale; 

end;