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 0a4acdc2f..8c34a5930 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
@@ -1508,11 +1508,15 @@ BOOL sf_is_battery_low(UINT8 refresh, UINT8 nightMode)
 {
 	UINT8 batteryVal = 0;
 	UINT8 batteryLevel = 0;
+    int cnt = 100;
     UINT8 PowerOnMode = sf_poweron_type_get();
 	if((refresh) && (PowerOnMode != PWR_ON_SETUP))
 	{
-        
-		sf_battery_value_fast_get();
+        sf_battery_value_fast_get();
+        while((sf_battery_level_get() == SF_BATT_LEVEL_TOTAL) && (cnt--))
+        {
+            vos_util_delay_ms(10);
+        }
 		//printf("DC=%d Custom=%d bat=%d\n", dcValue, CustomValue, batli8v);
 	}
 
@@ -1593,8 +1597,13 @@ void sf_set_need_check_first(void)
 *************************************************/
 BOOL sf_is_enough_power_to_update(void)
 {
+    int cnt = 100;
     //sf_set_need_check_first();
 	sf_battery_value_fast_get();
+    while((sf_battery_level_get() == SF_BATT_LEVEL_TOTAL) && (cnt--))
+    {
+        vos_util_delay_ms(10);
+    }
 	printf("update DC=%d Li=%d Bat=%d\n", DcVoltageVal, LiPolymerVoltageVal, BatVoltageVal);
 	
 	if(sf_battery_value_get(0) < 40)