diff --git a/MainCode/adalm1000_logger.py b/MainCode/adalm1000_logger.py
index a195842..a84acf0 100644
--- a/MainCode/adalm1000_logger.py
+++ b/MainCode/adalm1000_logger.py
@@ -670,13 +670,17 @@ class BatteryTester(QMainWindow):
 
     def update_status(self):
         """Update status information periodically"""
+        now = time.time()
+        if not hasattr(self, '_last_log_time'):
+            self._last_log_time = now
+
         if self.test_running:
             # Update capacity calculations if in test mode
             if self.measuring and self.time_data:
                 current_time = time.time() - self.start_time
                 delta_t = current_time - self.last_update_time
                 self.last_update_time = current_time
-                
+
                 if self.test_phase == "Discharge":
                     current_current = abs(self.current_data[-1])
                     self.capacity_ah += current_current * delta_t / 3600
@@ -686,6 +690,25 @@ class BatteryTester(QMainWindow):
                     self.charge_capacity += current_current * delta_t / 3600
                     self.charge_capacity_label.setText(f"{self.charge_capacity:.4f}")
 
+            # Logging (1x pro Sekunde)
+            if hasattr(self, 'log_writer') and (now - self._last_log_time >= 1.0):
+                if self.time_data:
+                    current_time = self.time_data[-1]
+                    voltage = self.voltage_data[-1]
+                    current = self.current_data[-1]
+                    self.log_writer.writerow([
+                        f"{current_time:.3f}",
+                        f"{voltage:.6f}",
+                        f"{current:.6f}",
+                        self.test_phase,
+                        f"{self.capacity_ah:.4f}",
+                        f"{self.charge_capacity:.4f}",
+                        f"{self.coulomb_efficiency:.1f}",
+                        f"{self.cycle_count}"
+                    ])
+                    self.current_cycle_file.flush()
+                    self._last_log_time = now
+
     def start_test(self):
         """Start the full battery test cycle"""
         # Clean up any previous test