my Skoda Octavia NFL (2020-Present) battery keeps dying overnight, what should I do?

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, wire brush, safety glasses.
• Ensure the vehicle is parked in a safe location and the engine is off.

2. Clean Battery Terminals

• Disconnect the negative terminal first, followed by the positive terminal.
• Clean the terminals and battery posts with a wire brush to remove any corrosion.
• Reconnect the positive terminal first, then the negative terminal, ensuring tight connections.

3. Replace Battery (if necessary)

• If the battery voltage was low or it failed the load test, replace it.
  • Sub-steps:
    • Remove the battery hold-down bracket using the socket set.
    • Carefully lift out the old battery, ensuring to avoid spilling any electrolyte.
    • Place the new battery in the tray, ensuring it is oriented correctly.
    • Reinstall the hold-down bracket and tighten it securely.
    • Connect the positive terminal first, then the negative terminal.

4. Address Parasitic Draw (if identified)

• Identify the circuit causing the draw using the multimeter.
• Check and repair any faulty wiring or components associated with the offending circuit.
• If aftermarket devices are causing the draw, consider disconnecting or replacing them.