Procedure

1. Initial Inspection:

   • Disconnect the battery and power off the drone.
   • Visually inspect the battery for any signs of swelling, leakage, or damage.
   • Examine soldering points and connections for looseness or corrosion.

2. Battery Diagnosis:

   • Measure battery voltage using a multimeter.
   • Ensure proper charge levels and balance across cells.
   • Replace the battery if significant degradation is observed.

3. PMU Inspection:

   • Check PMU connections with components like the flight controller and ESC.
   • Inspect for physical damage or burnt marks on the PMU circuit.
   • Use diagnostic LED indicators (if available) to verify functionality.

4. Repair and Maintenance:

   • Resolder any loose or weak connections.
   • Replace damaged components such as cables or connectors.
   • Secure all connections and reassemble the drone.

5. Final Testing:

   • Reconnect the battery and power on the drone.
   • Perform a test flight to ensure proper functioning.
   • Monitor for any abnormal behavior or power fluctuations.