2 files changed, 7 insertions, 3 deletions
diff --git a/src/org/traccar/MainEventHandler.java b/src/org/traccar/MainEventHandler.java
index 3a8e36146..a3bbb8fd6 100644
--- a/src/org/traccar/MainEventHandler.java
+++ b/src/org/traccar/MainEventHandler.java
@@ -77,7 +77,7 @@ public class MainEventHandler extends ChannelInboundHandlerAdapter {
             if (!position.getValid()) {
                 s.append(", invalid");
             }
-            Object batteryLevel = position.getInteger(Position.KEY_BATTERY_LEVEL);
+            Object batteryLevel = position.getInteger(Position.KEY_BATTERY_LEVEL, null);
             if (batteryLevel != null) {
                 s.append(", battery: ").append(batteryLevel).append('%');
             }
diff --git a/src/org/traccar/model/ExtendedModel.java b/src/org/traccar/model/ExtendedModel.java
index 8353d0e66..8271e41cc 100644
--- a/src/org/traccar/model/ExtendedModel.java
+++ b/src/org/traccar/model/ExtendedModel.java
@@ -108,14 +108,18 @@ public class ExtendedModel extends BaseModel {
         }
     }
 
-    public int getInteger(String key) {
+    public Integer getInteger(String key, Integer defaultValue) {
         if (attributes.containsKey(key)) {
             return ((Number) attributes.get(key)).intValue();
         } else {
-            return 0;
+            return defaultValue;
         }
     }
 
+    public int getInteger(String key) {
+        return getInteger(key, 0);
+    }
+
     public long getLong(String key) {
         if (attributes.containsKey(key)) {
             return ((Number) attributes.get(key)).longValue();