diff --git a/MainCode/adalm1000_logger.py b/MainCode/adalm1000_logger.py
index d42b30d..ccbee41 100644
--- a/MainCode/adalm1000_logger.py
+++ b/MainCode/adalm1000_logger.py
@@ -703,6 +703,13 @@ class BatteryTester:
                     # Write cycle summary to log file
                     self.write_cycle_summary()
 
+                    # Flush remaining buffer data 
+                    if hasattr(self, 'log_buffer') and self.log_buffer:
+                        with open(self.filename, 'a', newline='') as f:
+                            writer = csv.writer(f)
+                            writer.writerows(self.log_buffer)
+                        self.log_buffer.clear() 
+
             # Finalize test if stopped or completed
             self.safe_after(0, self.finalize_test)