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How to replace the battery of the Bold Smart Lock?

Replace the battery of your Bold Smart Lock quickly and safely by removing the lock and following this step-by-step guide.

When your Bold Smart Lock needs a new battery, the Bold app will notify you on time. You can easily replace the battery yourself. This guide walks you through the process.

The Bold Smart Lock uses a CR123A battery, which you can order online or purchase at all well-known DIY stores.

Please DO NOT USE rechargeable CR123A batteries.


Step-by-step: Replace your Bold Smart Lock battery

  1. Start by removing the outside knob.
    This allows access to the locking mechanism on the inside of the door.

  2. Remove the lock out of the door completely by unscrewing the locking screw at the side of the door that secures the Bold Smart Lock in place.

  3. Remove the small screw in the inside knob (on the back side). This screw keeping the Smart Engine in place.

  4. battery_0001_Gen2-ReleaseEngine-01 (3)Press the two black pins on the back of the inside knob to release the Smart Engine.
    If it does not come out easily, gently push it further out at the height of the pins using a small tool (like the hex wrench that came with your lock or a flathead screwdriver).battery_0000_Gen2-RemoveEngine (2)

    1. Slide the Smart Engine out of the knob completely.

      battery_0003_Gen2-RemoveCover-01 (2)
    2. Slide the black cap on the Smart Engine to the side to open
      the battery compartment. 

    3. battery_0002_Gen2-RemoveBattery-01 (2)Remove the old battery and firmly press the new CR123A battery into place until you hear a click.

    4. Close the battery compartment and reinsert the Smart Engine into the inside knob.
      Align the notch on the Smart Engine with the metal guide inside the knob.

    5. Make sure the Smart Engine is fully inserted.
      You will know it is correctly in place when the black pins visibly protrude from the back of the knob.Screenshot 2024-05-24 at 15.44.29

      1. Replace the small screw on the back of the inside knob.

      2. Reinstall the Bold Smart Lock in your door by securing the cylinder again with the locking screw and reattaching the outside knob.

      3. Sync the battery status with the Bold app.
        Activate the lock using your phone to update the battery level. You may see a “calibrate 24 hours” message, the new battery status will appear after this period.

      Your Bold Smart Lock is now ready to go, secure, powered, and fully operational.