diff --git a/examples/simple_repeater/MyMesh.cpp b/examples/simple_repeater/MyMesh.cpp
index 4136818c..091d7901 100644
--- a/examples/simple_repeater/MyMesh.cpp
+++ b/examples/simple_repeater/MyMesh.cpp
@@ -710,6 +710,8 @@ MyMesh::MyMesh(mesh::MainBoard &board, mesh::Radio &radio, mesh::MillisecondCloc
   _prefs.gps_enabled = 0;
   _prefs.gps_interval = 0;
   _prefs.advert_loc_policy = ADVERT_LOC_PREFS;
+
+  _prefs.adc_multiplier = 0.0f; // 0.0f means use default board multiplier
 }
 
 void MyMesh::begin(FILESYSTEM *fs) {
@@ -733,6 +735,8 @@ void MyMesh::begin(FILESYSTEM *fs) {
   updateAdvertTimer();
   updateFloodAdvertTimer();
 
+  board.setAdcMultiplier(_prefs.adc_multiplier);
+
 #if ENV_INCLUDE_GPS == 1
   applyGpsPrefs();
 #endif
diff --git a/examples/simple_room_server/MyMesh.cpp b/examples/simple_room_server/MyMesh.cpp
index de06b4c6..7b575e6f 100644
--- a/examples/simple_room_server/MyMesh.cpp
+++ b/examples/simple_room_server/MyMesh.cpp
@@ -641,6 +641,8 @@ void MyMesh::begin(FILESYSTEM *fs) {
   updateAdvertTimer();
   updateFloodAdvertTimer();
 
+  board.setAdcMultiplier(_prefs.adc_multiplier);
+
 #if ENV_INCLUDE_GPS == 1
   applyGpsPrefs();
 #endif
diff --git a/examples/simple_sensor/SensorMesh.cpp b/examples/simple_sensor/SensorMesh.cpp
index 20d9921b..96a3791d 100644
--- a/examples/simple_sensor/SensorMesh.cpp
+++ b/examples/simple_sensor/SensorMesh.cpp
@@ -740,6 +740,8 @@ void SensorMesh::begin(FILESYSTEM* fs) {
   updateAdvertTimer();
   updateFloodAdvertTimer();
 
+   board.setAdcMultiplier(_prefs.adc_multiplier);
+
 #if ENV_INCLUDE_GPS == 1
   applyGpsPrefs();
 #endif
diff --git a/src/MeshCore.h b/src/MeshCore.h
index 94bf351d..11a6a5b4 100644
--- a/src/MeshCore.h
+++ b/src/MeshCore.h
@@ -42,6 +42,8 @@ namespace mesh {
 class MainBoard {
 public:
   virtual uint16_t getBattMilliVolts() = 0;
+  virtual bool setAdcMultiplier(float multiplier) { return false; };
+  virtual float getAdcMultiplier() const { return 0.0f; }
   virtual const char* getManufacturerName() const = 0;
   virtual void onBeforeTransmit() { }
   virtual void onAfterTransmit() { }
diff --git a/src/helpers/CommonCLI.cpp b/src/helpers/CommonCLI.cpp
index 93773cce..17b2b753 100644
--- a/src/helpers/CommonCLI.cpp
+++ b/src/helpers/CommonCLI.cpp
@@ -70,7 +70,8 @@ void CommonCLI::loadPrefsInt(FILESYSTEM* fs, const char* filename) {
     file.read((uint8_t *)&_prefs->gps_interval, sizeof(_prefs->gps_interval));                     // 157
     file.read((uint8_t *)&_prefs->advert_loc_policy, sizeof (_prefs->advert_loc_policy));          // 161
     file.read((uint8_t *)&_prefs->discovery_mod_timestamp, sizeof(_prefs->discovery_mod_timestamp)); // 162
-    // 166
+    file.read((uint8_t *)&_prefs->adc_multiplier, sizeof(_prefs->adc_multiplier)); // 166
+    // 170
 
     // sanitise bad pref values
     _prefs->rx_delay_base = constrain(_prefs->rx_delay_base, 0, 20.0f);
@@ -83,6 +84,7 @@ void CommonCLI::loadPrefsInt(FILESYSTEM* fs, const char* filename) {
     _prefs->cr = constrain(_prefs->cr, 5, 8);
     _prefs->tx_power_dbm = constrain(_prefs->tx_power_dbm, 1, 30);
     _prefs->multi_acks = constrain(_prefs->multi_acks, 0, 1);
+    _prefs->adc_multiplier = constrain(_prefs->adc_multiplier, 0.0f, 10.0f);
 
     // sanitise bad bridge pref values
     _prefs->bridge_enabled = constrain(_prefs->bridge_enabled, 0, 1);
@@ -148,7 +150,8 @@ void CommonCLI::savePrefs(FILESYSTEM* fs) {
     file.write((uint8_t *)&_prefs->gps_interval, sizeof(_prefs->gps_interval));                     // 157
     file.write((uint8_t *)&_prefs->advert_loc_policy, sizeof(_prefs->advert_loc_policy));           // 161
     file.write((uint8_t *)&_prefs->discovery_mod_timestamp, sizeof(_prefs->discovery_mod_timestamp)); // 162
-    // 166
+    file.write((uint8_t *)&_prefs->adc_multiplier, sizeof(_prefs->adc_multiplier));                 // 166
+    // 170
 
     file.close();
   }
@@ -331,6 +334,13 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch
       } else if (memcmp(config, "bridge.secret", 13) == 0) {
         sprintf(reply, "> %s", _prefs->bridge_secret);
 #endif
+      } else if (memcmp(config, "adc.multiplier", 14) == 0) {
+        float adc_mult = _board->getAdcMultiplier();
+        if (adc_mult == 0.0f) {
+          strcpy(reply, "Error: unsupported by this board");
+        } else {
+          sprintf(reply, "> %.3f", adc_mult);
+        }
       } else {
         sprintf(reply, "??: %s", config);
       }
@@ -523,6 +533,19 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch
         savePrefs();
         strcpy(reply, "OK");
 #endif
+      } else if (memcmp(config, "adc.multiplier ", 15) == 0) {
+        _prefs->adc_multiplier = atof(&config[15]);
+        if (_board->setAdcMultiplier(_prefs->adc_multiplier)) {
+          savePrefs();
+          if (_prefs->adc_multiplier == 0.0f) {
+            strcpy(reply, "OK - using default board multiplier");
+          } else {
+            sprintf(reply, "OK - multiplier set to %.3f", _prefs->adc_multiplier);
+          }
+        } else {
+          _prefs->adc_multiplier = 0.0f;
+          strcpy(reply, "Error: unsupported by this board");
+        };
       } else {
         sprintf(reply, "unknown config: %s", config);
       }
diff --git a/src/helpers/CommonCLI.h b/src/helpers/CommonCLI.h
index a665e014..068783ab 100644
--- a/src/helpers/CommonCLI.h
+++ b/src/helpers/CommonCLI.h
@@ -47,6 +47,7 @@ struct NodePrefs { // persisted to file
   uint32_t gps_interval; // in seconds
   uint8_t advert_loc_policy;
   uint32_t discovery_mod_timestamp;
+  float adc_multiplier;
 };
 
 class CommonCLICallbacks {
diff --git a/variants/promicro/PromicroBoard.h b/variants/promicro/PromicroBoard.h
index e4b67415..dc20e550 100644
--- a/variants/promicro/PromicroBoard.h
+++ b/variants/promicro/PromicroBoard.h
@@ -23,6 +23,7 @@ class PromicroBoard : public mesh::MainBoard {
 protected:
   uint8_t startup_reason;
   uint8_t btn_prev_state;
+  float adc_mult = ADC_MULTIPLIER;
 
 public:
   void begin();
@@ -39,7 +40,23 @@ public:
       raw += analogRead(PIN_VBAT_READ);
     }
     raw = raw / BATTERY_SAMPLES;
-    return (ADC_MULTIPLIER * raw);
+    return (adc_mult * raw);
+  }
+
+  bool setAdcMultiplier(float multiplier) override {
+    if (multiplier == 0.0f) {
+      adc_mult = ADC_MULTIPLIER;}
+    else {
+      adc_mult = multiplier;
+    }
+    return true;
+  }
+  float getAdcMultiplier() const override {
+    if (adc_mult == 0.0f) {
+      return ADC_MULTIPLIER;
+    } else {
+      return adc_mult;
+    }
   }
 
   const char* getManufacturerName() const override {