diff --git a/app/menu.c b/app/menu.c
index 722a461..aeca884 100644
--- a/app/menu.c
+++ b/app/menu.c
@@ -290,11 +290,6 @@ int MENU_GetLimits(uint8_t Cursor, int32_t *pMin, int32_t *pMax)
 			*pMax = ARRAY_SIZE(gSubMenu_PTT_ID) - 1;
 			break;
 
-		case MENU_VOL:
-			*pMin = 1760;  // 0
-			*pMax = 2000;  // 2300
-			break;
-
 		case MENU_BAT_TXT:
 			*pMin = 0;
 			*pMax = ARRAY_SIZE(gSubMenu_BAT_TXT) - 1;
@@ -320,6 +315,11 @@ int MENU_GetLimits(uint8_t Cursor, int32_t *pMin, int32_t *pMax)
 			*pMax = +50;
 			break;
 
+		case MENU_BATCAL:
+			*pMin = 1760;  // 0
+			*pMax = 2000;  // 2300
+			break;
+
 		default:
 			return -1;
 	}
@@ -616,11 +616,6 @@ void MENU_AcceptSetting(void)
 			gRequestSaveChannel         = 1;
 			return;
 
-		case MENU_VOL:
-			if (gF_LOCK)
-				EEPROM_WriteBuffer(0x1F40, gBatteryCalibration);
-			break;
-
 		case MENU_BAT_TXT:
 			gSetting_battery_text = gSubMenuSelection;
 			break;
@@ -734,6 +729,11 @@ void MENU_AcceptSetting(void)
 			if (gF_LOCK)
 				writeXtalFreqCal(gSubMenuSelection);
 			return;
+
+		case MENU_BATCAL:
+			gBatteryCalibration[3] = gSubMenuSelection;
+			EEPROM_WriteBuffer(0x1F40, gBatteryCalibration);
+			break;
 	}
 
 	gRequestSaveSettings = true;
@@ -1009,10 +1009,6 @@ void MENU_ShowCurrentSetting(void)
 			gSubMenuSelection = gTxVfo->DTMF_PTT_ID_TX_MODE;
 			break;
 
-		case MENU_VOL:
-			gSubMenuSelection = gBatteryCalibration[3];
-			return;
-
 		case MENU_BAT_TXT:
 			gSubMenuSelection = gSetting_battery_text;
 			return;
@@ -1098,6 +1094,13 @@ void MENU_ShowCurrentSetting(void)
 		case MENU_F_CALI:
 			gSubMenuSelection = gEeprom.BK4819_XTAL_FREQ_LOW;
 			break;
+
+		case MENU_BATCAL:
+			gSubMenuSelection = gBatteryCalibration[3];
+			break;
+			
+		default:
+			return;
 	}
 
 //	if (gFlagBackupSetting)
@@ -1286,14 +1289,11 @@ static void MENU_Key_EXIT(bool bKeyPressed, bool bKeyHeld)
 			// ***********************
 			// restore original value
 
-			if (gMenuCursor == MENU_VOL)
+			if (gMenuCursor == MENU_BATCAL)
 			{
 				if (gF_LOCK)
 				{
 					EEPROM_ReadBuffer(0x1F40, gBatteryCalibration, 8);
-					
-//					gBatteryCalibration[3] = gSubMenuSelection_original;
-					
 					BATTERY_GetReadings(true);
 				}
 			}
diff --git a/firmware.bin b/firmware.bin
index 6734d79..005ff71 100644
Binary files a/firmware.bin and b/firmware.bin differ
diff --git a/firmware.packed.bin b/firmware.packed.bin
index 48a816b..8639629 100644
Binary files a/firmware.packed.bin and b/firmware.packed.bin differ
diff --git a/main.c b/main.c
index 93561e0..9f1c9d6 100644
--- a/main.c
+++ b/main.c
@@ -112,7 +112,7 @@ void Main(void)
 	if (BootMode == BOOT_MODE_F_LOCK)
 		gF_LOCK = true;            // flag to say use the hidden menu items
 	else
-		gMenuListCount -= 8;       // hide the last few menu items
+		gMenuListCount -= 9;       // hide the last few menu items
 
 	// wait for user to release all butts before moving on
 	if (!GPIO_CheckBit(&GPIOC->DATA, GPIOC_PIN_PTT) ||
diff --git a/ui/menu.c b/ui/menu.c
index 56ac599..313d7f6 100644
--- a/ui/menu.c
+++ b/ui/menu.c
@@ -127,7 +127,8 @@ const t_menu_item MenuList[] =
 
 	{"TX-EN",  VOICE_ID_INVALID,                       MENU_TX_EN      }, // enable TX
 	{"F-CALI", VOICE_ID_INVALID,                       MENU_F_CALI     }, // reference xtal calibration
-
+	{"BATCAL", VOICE_ID_INVALID,                       MENU_BATCAL     }, // battery voltage calibration
+	
 	{"",       VOICE_ID_INVALID,                       0xff            }  // end of list - DO NOT delete or move this this
 };
 
@@ -770,6 +771,13 @@ void UI_DisplayMenu(void)
 					xtal_Hz / 1000000, xtal_Hz % 1000000);
 			}
 			break;
+
+		case MENU_BATCAL:
+		{
+			const uint16_t vol = (uint32_t)gBatteryVoltageAverage * gBatteryCalibration[3] / gSubMenuSelection;
+			sprintf(String, "%u.%02uV\n%u", vol / 100, vol % 100, gSubMenuSelection);
+			break;
+		}
 	}
 
 	if (!already_printed)
diff --git a/ui/menu.h b/ui/menu.h
index e9e1e5d..156c72d 100644
--- a/ui/menu.h
+++ b/ui/menu.h
@@ -113,7 +113,8 @@ enum
 	MENU_SCREN,
 
 	MENU_TX_EN,   // enable TX
-	MENU_F_CALI   // reference xtal calibration
+	MENU_F_CALI,  // reference xtal calibration
+	MENU_BATCAL   // battery voltage calibration
 };
 
 extern const t_menu_item MenuList[];