diff --git a/app/src/main/cpp/PhoneDevice.cpp b/app/src/main/cpp/PhoneDevice.cpp
index d6b24942..1c0ccc36 100644
--- a/app/src/main/cpp/PhoneDevice.cpp
+++ b/app/src/main/cpp/PhoneDevice.cpp
@@ -1266,18 +1266,19 @@ bool CPhoneDevice::EnableGPS(bool enabled)
     return true;
 }
 
-float CPhoneDevice::QueryBattaryVoltage(int timesForAvg, bool* isCharging)
+int CPhoneDevice::QueryBattaryVoltage(int timesForAvg, int* chargingVoltage)
 {
     if (timesForAvg <= 0)
     {
-        return 0.0f;
+        timesForAvg = 1;
     }
 
     int val = 0;
     int totalVals = 0;
-    float chargingBusVoltage = 0.0f;
+    int cv = 0;
     int idx = 0;
     XYLOG(XYLOG_SEVERITY_DEBUG, "WorkStatus BusVoltage");
+    int matched = 0;
     for (idx = 0; idx < timesForAvg; idx++)
     {
         // auto now = std::chrono::system_clock::now();
@@ -1287,18 +1288,19 @@ float CPhoneDevice::QueryBattaryVoltage(int timesForAvg, bool* isCharging)
         // XYLOG(XYLOG_SEVERITY_DEBUG, "WorkStatus BusVoltage val=%d, time=%lld", val, static_cast<long long>(duration));
         if (val > 1000)
         {
-            chargingBusVoltage = (float)val / 1000.0;
+            cv += val;
+            matched++;
             break;
         }
     }
     XYLOG(XYLOG_SEVERITY_DEBUG, "WorkStatus BusVoltage end");
 
-    if (isCharging != NULL)
+    if (chargingVoltage != NULL)
     {
-        *isCharging = chargingBusVoltage > DEFAULT_WARNING_CHARGING_BUS_VOL;
+        *chargingVoltage = matched > 0 ? (cv / matched) : 0;
     }
     XYLOG(XYLOG_SEVERITY_DEBUG, "WorkStatus BatteryVoltage");
-    int matched = 0;
+    matched = 0;
     for (int idx = 0; idx < timesForAvg; idx++)
     {
         // auto now3 = std::chrono::system_clock::now();
@@ -1313,7 +1315,7 @@ float CPhoneDevice::QueryBattaryVoltage(int timesForAvg, bool* isCharging)
         }
     }
     XYLOG(XYLOG_SEVERITY_DEBUG, "WorkStatus BatteryVoltage end");
-    return (matched > 0) ? ((float)totalVals / 1000.0 / matched) : 0;
+    return (matched > 0) ? (totalVals / matched) : 0;
 }
 
 uint32_t CPhoneDevice::QueryLdr()
diff --git a/app/src/main/cpp/PhoneDevice.h b/app/src/main/cpp/PhoneDevice.h
index 573abb47..a5b0eb2c 100644
--- a/app/src/main/cpp/PhoneDevice.h
+++ b/app/src/main/cpp/PhoneDevice.h
@@ -234,7 +234,7 @@ public:
 	virtual bool InstallAPP(const std::string& path, unsigned int delayedTime);
     virtual bool Reboot(int resetType, bool manually, const std::string& reason, uint32_t timeout = 1000);
 	virtual bool EnableGPS(bool enabled);
-    virtual float QueryBattaryVoltage(int timesForAvg, bool* isCharging);
+    virtual int QueryBattaryVoltage(int timesForAvg, int* isCharging);
     virtual uint32_t QueryLdr();
 	virtual bool RequestPosition();
     virtual timer_uid_t RegisterHeartbeat(unsigned int timerType, unsigned int timeout, time_t tsForNextPhoto);