diff --git a/code/application/source/sf_app/code/source/battery/sf_battery.c b/code/application/source/sf_app/code/source/battery/sf_battery.c
index e4b289a76..b5954dddb 100755
--- a/code/application/source/sf_app/code/source/battery/sf_battery.c
+++ b/code/application/source/sf_app/code/source/battery/sf_battery.c
@@ -104,7 +104,7 @@ UINT32 sf_battery_voltage_convert(UINT32 resistanceGnd, UINT32 resistanceVin, UI
 
 	//volt = 27  * adcVal * (resistanceGnd + resistanceVin) / resistanceGnd / 511;
 	//volt = 27  * adcVal * (resistanceGnd + resistanceVin) / resistanceGnd / 2696;
-    volt = (27  * adcVal + 3097) / 531;
+    volt = (27  * adcVal + 554) / 539;
 	return volt;
 }
 
@@ -126,7 +126,7 @@ UINT32 sf_aa_battery_voltage_convert(UINT32 resistanceGnd, UINT32 resistanceVin,
 	 */
 
 	//volt = 27  * adcVal * (resistanceGnd + resistanceVin) / resistanceGnd / 511;
-	volt = (27  * adcVal + 554) / 539;
+	volt = (27  * adcVal + 3097) / 531;
 	return volt;
 }
 
@@ -136,7 +136,7 @@ UINT32 sf_battery_convert_to_adc(UINT32 resistanceGnd, UINT32 resistanceVin, UIN
 
 	//adcVal = volt * resistanceGnd * 511 / 27 / (resistanceGnd + resistanceVin);
 	//adcVal = volt * resistanceGnd * 2696 / 27 / (resistanceGnd + resistanceVin);
-    adcVal = (volt * 531 - 3097) / 27;
+    adcVal = (volt * 539 - 554) / 27;
 	return adcVal;
 }
 
@@ -146,7 +146,7 @@ UINT32 sf_aa_battery_convert_to_adc(UINT32 resistanceGnd, UINT32 resistanceVin,
 
 	//adcVal = volt * resistanceGnd * 511 / 27 / (resistanceGnd + resistanceVin);
 	//adcVal = volt * resistanceGnd * 2696 / 27 / (resistanceGnd + resistanceVin);
-    adcVal = (volt * 539 - 554) / 27;
+    adcVal = (volt * 531 - 3097) / 27;
 	return adcVal;
 }
 UINT32 sf_get_max_value(UINT32 *_ValueList)
diff --git a/rtos/code/driver/na51089/source/mcu/sf_battery.c b/rtos/code/driver/na51089/source/mcu/sf_battery.c
index 480819130..55cafa9f1 100755
--- a/rtos/code/driver/na51089/source/mcu/sf_battery.c
+++ b/rtos/code/driver/na51089/source/mcu/sf_battery.c
@@ -108,7 +108,7 @@ UINT32 sf_battery_voltage_convert(UINT32 resistanceGnd, UINT32 resistanceVin, UI
 
 	//volt = 27  * adcVal * (resistanceGnd + resistanceVin) / resistanceGnd / 511;
 	//volt = 27  * adcVal * (resistanceGnd + resistanceVin) / resistanceGnd / 2696;
-    volt = (27  * adcVal + 3097) / 531;
+    volt = (27  * adcVal + 554) / 539;
 	return volt;
 }
 
@@ -130,7 +130,7 @@ UINT32 sf_aa_battery_voltage_convert(UINT32 resistanceGnd, UINT32 resistanceVin,
 	 */
 
 	//volt = 27  * adcVal * (resistanceGnd + resistanceVin) / resistanceGnd / 511;
-	volt = (27  * adcVal + 554) / 539;
+	volt = (27  * adcVal + 3097) / 531;
 	return volt;
 }
 
@@ -140,16 +140,17 @@ UINT32 sf_battery_convert_to_adc(UINT32 resistanceGnd, UINT32 resistanceVin, UIN
 
 	//adcVal = volt * resistanceGnd * 511 / 27 / (resistanceGnd + resistanceVin);
 	//adcVal = volt * resistanceGnd * 2696 / 27 / (resistanceGnd + resistanceVin);
-    adcVal = (volt * 531 - 3097) / 27;
+    adcVal = (volt * 539 - 554) / 27;
 	return adcVal;
 }
+
 UINT32 sf_aa_battery_convert_to_adc(UINT32 resistanceGnd, UINT32 resistanceVin, UINT32 volt)
 {
 	UINT32 adcVal = 0;
 
 	//adcVal = volt * resistanceGnd * 511 / 27 / (resistanceGnd + resistanceVin);
 	//adcVal = volt * resistanceGnd * 2696 / 27 / (resistanceGnd + resistanceVin);
-    adcVal = (volt * 539 - 554) / 27;
+    adcVal = (volt * 531 - 3097) / 27;
 	return adcVal;
 }
 UINT32 sf_get_max_value(UINT32 *_ValueList)
@@ -1674,10 +1675,7 @@ void sf_BatteryInfoSave(char *name, FST_FILE fd)
     	close(fd);
         printf("Add Success st_size:%ld\n", st.st_size);
         */
-        ret_fs = FileSys_SeekFile(fd, 0, FST_SEEK_END);
-        if (ret_fs != FST_STA_OK) {
-            printf("%s:%d seek file failed\r\n", __FUNCTION__, __LINE__);
-        }
+
         size = strlen(tmpBuf);
         printf("%s:%d size:%lu\r\n", __FUNCTION__, __LINE__, size);
         ret_fs = FileSys_WriteFile(fd, (UINT8*)tmpBuf, &size, 0, NULL);