diff --git a/src/Power.cpp b/src/Power.cpp
index e22ccb92c..e4024da4c 100644
--- a/src/Power.cpp
+++ b/src/Power.cpp
@@ -414,13 +414,19 @@ class AnalogBatteryLevel : public HasBatteryLevel
 #ifdef EXT_CHRG_DETECT
         return digitalRead(EXT_CHRG_DETECT) == ext_chrg_detect_value;
 #else
-#if HAS_TELEMETRY && !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR && !defined(ARCH_PORTDUINO) && !defined(ARCH_STM32WL)
+#if HAS_TELEMETRY && !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR && !defined(ARCH_PORTDUINO) && !defined(ARCH_STM32WL) && !defined(DISABLE_INA_CHARGING_DETECTION)
         if (hasINA()) {
+            // get current flow from INA sensor - negative value means power flowing into the battery
+            // default assuming  BATTERY+  <--> INA_VIN+ <--> SHUNT RESISTOR <--> INA_VIN- <--> LOAD
             LOG_DEBUG("Using INA on I2C addr 0x%x for charging detection", config.power.device_battery_ina_address);
+#if defined(INA_CHARGING_DETECTION_INVERT)
+            return getINACurrent() > 0;
+#else
             return getINACurrent() < 0;
-        }
 #endif
+        }
         return isBatteryConnect() && isVbusIn();
+#endif
 #endif
     }