diff --git a/src/main/java/org/nanoboot/utils/timecalc/gui/progress/HourBattery.java b/src/main/java/org/nanoboot/utils/timecalc/gui/progress/HourBattery.java
index ab08e5a..71b6b23 100644
--- a/src/main/java/org/nanoboot/utils/timecalc/gui/progress/HourBattery.java
+++ b/src/main/java/org/nanoboot/utils/timecalc/gui/progress/HourBattery.java
@@ -12,6 +12,9 @@ public class HourBattery extends Battery{
     }
     public static double getHourProgress(TimeHM timeRemains, int secondsRemains,
             int millisecondsRemains) {
+        if(secondsRemains < 0 || millisecondsRemains < 0 || timeRemains.getHour() < 0 || timeRemains.getMinute() < 0) {
+            return 1;
+        }
         double minutesRemainsD = timeRemains.getMinute();
         double secondsRemainsD = secondsRemains;
         double millisecondsRemainsD = millisecondsRemains;
diff --git a/src/main/java/org/nanoboot/utils/timecalc/gui/progress/MonthBattery.java b/src/main/java/org/nanoboot/utils/timecalc/gui/progress/MonthBattery.java
index 48e3b96..a1115a0 100644
--- a/src/main/java/org/nanoboot/utils/timecalc/gui/progress/MonthBattery.java
+++ b/src/main/java/org/nanoboot/utils/timecalc/gui/progress/MonthBattery.java
@@ -9,6 +9,9 @@ public class MonthBattery extends Battery{
         super("Month", x, i, i1);
     }
     public static double getMonthProgress(int weekDayWhenMondayIsOne, int workDaysDone, int workDaysTotal, double done) {
+        if(done >1) {
+            done = 1;
+        }
 return weekDayWhenMondayIsOne == 0
        || weekDayWhenMondayIsOne == 6 ?
         workDaysDone / workDaysTotal :
diff --git a/src/main/java/org/nanoboot/utils/timecalc/gui/progress/WeekBattery.java b/src/main/java/org/nanoboot/utils/timecalc/gui/progress/WeekBattery.java
index c169edd..e8be4d7 100644
--- a/src/main/java/org/nanoboot/utils/timecalc/gui/progress/WeekBattery.java
+++ b/src/main/java/org/nanoboot/utils/timecalc/gui/progress/WeekBattery.java
@@ -11,6 +11,9 @@ public class WeekBattery extends Battery{
         super("Week", x, i, i1);
     }
     public static double getWeekProgress(int weekDayWhenMondayIsOne, double done) {
+        if(done >1) {
+            done = 1;
+        }
 return weekDayWhenMondayIsOne == 0
        || weekDayWhenMondayIsOne == 6 ?
         100 : ((weekDayWhenMondayIsOne - 1) * 0.20 + done * 0.20);