diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
index 2507cf59..0e008494 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
@@ -262,12 +262,16 @@ public class AppMaster {
             // }
 
             try {
-                String battery = getBatteryVoltage() + "V/" + getChargingBatteryVoltage() + "V";
+                String battery = mService.getBatteryVoltage() + "V/" + mService.getChargingBatteryVoltage() + "V";
                 postParams.add(new Pair<String, String>("battery", battery));
             } catch (Exception ex) {
                 ex.printStackTrace();
             }
 
+            if (mService.isSeparateNetwork()) {
+                postParams.add(new Pair<String, String>("maxBCV", mService.getAndResetMaxBCV()));
+            }
+
             for (int idx = 0; idx < 3; idx++) {
                 try {
                     httpURLConnection = (HttpURLConnection) url.openConnection();
@@ -441,29 +445,34 @@ public class AppMaster {
             ex.printStackTrace();
         }
     }
-
-    private String getBatteryVoltage() {
-        int val = 0;
-        for (int idx = 0; idx < 3; idx++) {
-            val = MpMasterService.getInt(115);
-            if (val > 0) {
-                return Integer.toString(val / 1000) + "." + Integer.toString((val % 1000) / 100);
-            }
-        }
-
-        return "";
-    }
-
-    private String getChargingBatteryVoltage() {
-        int val = 0;
-        for (int idx = 0; idx < 3; idx++) {
-            val = MpMasterService.getInt(112);
-            if (val > 0) {
-                return Integer.toString(val / 1000) + "." + Integer.toString((val % 1000) / 100);
+    
+    private String getCrashTimes(final long startTimeMs, final long endTimeMs) {
+        String path = "/data/system/dropbox/";
+        final String prefixFileName = "data_app_crash@";
+        final int[] cnts = new int[2];
+        cnts[0] = 0;
+        cnts[1] = 0;
+
+        long weekStartTime = startTimeMs - 86400000 * 7;
+        FileFilter fileFilter = new FileFilter() {
+            @Override
+            public boolean accept(File pathname) {
+                if (pathname.isFile() && pathname.getName().startsWith(prefixFileName) && pathname.lastModified() <= endTimeMs) {
+                    if (pathname.lastModified() >= startTimeMs) {
+                        cnts[0]++;
+                    }
+                    // if (pathname.lastModified() >= weekStartTime) {
+                        cnts[1]++;
+                    // }
+                }
+                return false;
             }
-        }
+        };
+        File file = new File(path);
+        String[] files = file.list();
+        File[] subFiles = file.listFiles(fileFilter);
 
-        return "";
+        return ((cnts[0] == 0) && (cnts[1] == 0)) ? null : Integer.toString(cnts[0]) + " " + Integer.toString(cnts[1]);
     }
 
     private String getImei(int number) {
diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
index 1b2ad089..12c341c5 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
@@ -127,6 +127,9 @@ public class MpMasterService extends Service {
 
     private long mPreviousMpHbTime = 0;
 
+    private int mMaxBCV = 0;
+    private long mMaxBCVTime = 0;
+
     private String mIccid1 = null;
     private String mIccid2 = null;
 
@@ -198,6 +201,8 @@ public class MpMasterService extends Service {
 
         mPreviousMpHbTime = System.currentTimeMillis();
 
+        buildChargingBatteryVoltage(System.currentTimeMillis());
+
         logger.info("MpMaster started version=" + mMpMasterVersion);
 
         mHander = new Handler();
@@ -530,6 +535,8 @@ public class MpMasterService extends Service {
                 mService.mPreviousHeartbeatTime = 0;
                 mService.registerHeartbeatTimer();
 
+                mService.buildChargingBatteryVoltage(System.currentTimeMillis());
+
                 if (!keepAlive) {
                     mService.startMaster(false);
                 }
@@ -546,6 +553,7 @@ public class MpMasterService extends Service {
 
                 mService.registerHeartbeatTimer();
 
+                mService.buildChargingBatteryVoltage(System.currentTimeMillis());
                 if (!mService.mSeparateNetwork && (!mService.mMntnMode)) {
                     mService.startMaster(true);
                 }
@@ -609,7 +617,6 @@ public class MpMasterService extends Service {
                 SysApi.installOTA(context, context.getPackageName(), path);
             }
         });
-
     }
 
     private void registerHeartbeatTimer() {
@@ -919,6 +926,57 @@ public class MpMasterService extends Service {
         return signalLevel;
     }
 
+    public static String getBatteryVoltage() {
+        int val = 0;
+        for (int idx = 0; idx < 3; idx++) {
+            val = MpMasterService.getInt(115);
+            if (val > 0) {
+                return Integer.toString(val / 1000) + "." + Integer.toString((val % 1000) / 100);
+            }
+        }
+
+        return "";
+    }
+
+    private void buildChargingBatteryVoltage(long ts) {
+        int val = 0;
+        for (int idx = 0; idx < 3; idx++) {
+            val = MpMasterService.getInt(112);
+            if (val > 0) {
+                break;
+            }
+        }
+
+        if (val > 0) {
+            if (val > mMaxBCV) {
+                mMaxBCV = val;
+                mMaxBCVTime = ts;
+            }
+        }
+    }
+
+    public String getAndResetMaxBCV() {
+        String val = Integer.toString(mMaxBCV / 1000) + "." + Integer.toString((mMaxBCV % 1000) / 100)
+                + "/" + Long.toString(mMaxBCVTime / 1000);
+
+        mMaxBCV = 0;
+        mMaxBCVTime = 0;
+
+        return val;
+    }
+
+    public static String getChargingBatteryVoltage() {
+        int val = 0;
+        for (int idx = 0; idx < 3; idx++) {
+            val = MpMasterService.getInt(112);
+            if (val > 0) {
+                return Integer.toString(val / 1000) + "." + Integer.toString((val % 1000) / 100);
+            }
+        }
+
+        return "";
+    }
+
     public void downloadAndInstall(final String url) {
 
         final Context context = getApplicationContext();