Hello! I understand your GARDENA robotic mower is not returning to its base station and keeps mowing until the battery dies. Let’s sort this out step by step.

First, may I ask which model of GARDENA mower you have? Also, have you noticed if it ever tries to navigate back at all, or does it continuously mow without any attempt to return?

Meanwhile, here are some initial checks and fixes we can try:

1. Check the Boundary and Guide Wires
The mower relies on boundary and guide wires to find its way back. Inspect if these wires are intact and properly connected to the charging station. If the wires are damaged, the mower may fail to detect the path home.

2. Restart Your Mower and App
Turn off your mower, then turn it back on. Also, close and reopen your GARDENA Bluetooth app on your Windows device. Sometimes a simple reboot refreshes the system.

3. Ensure the Charging Station Has Power
Confirm the base station is powered on and functional. If it’s not receiving power, the mower won't dock even if it tries to return.

4. Check for Sensor Issues
Some users experience problems due to sensors related to detecting the return wire. Cleaning the sensors gently might help.

5. Battery Health
If your battery's charge drops quickly or irregularly, it might struggle to make the trip back. Do you notice any signs like shorter mowing times or inconsistent behavior?

Please try these steps and let me know what you observe. If the issue persists, we can explore advanced troubleshooting related to navigation settings in the app or sensor calibration.

Are you comfortable checking the wires and restarting your device first?