What i changed to display the warning message.

//  if (!(acpi = fopen ("/proc/acpi/ac_adapter/0/status", "r")))
//    if (!(acpi = fopen ("/proc/acpi/ac_adapter/ACAD/state", "r")))
//      if (!(acpi = fopen ("/proc/acpi/ac_adapter/AC/state", "r")))
//        if (!(acpi = fopen ("/proc/acpi/ac_adapter/ADP1/state", "r")))
//	        return -1;

  if (!(acpi = fopen ("/proc/acpi/battery/BAT1/state", "r")))
        return -1;

  fread (buf, 512, 1, acpi);
  fclose (acpi);
  if (!acadstate) acadstate=(ACADstate *)malloc(sizeof(ACADstate));

  if ( (ptr = strstr(buf, "charging state:")) )
  {
    stat = *(ptr + 25);
    if (stat == 'c') acadstate->state = 1;
    if (stat == 'd')
  	{
	    acadstate->state = 0;
	    return 0;
  	}
  }