How to replace the battery?

You can replace the battery yourself. It is easiest to remove the Bold Smart Cylinder from the door to do this. We offer you a short step-by-step guide to explain how to do this.

When the battery needs replacing, you will receive a timely notification through the Bold App.

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

Please DO NOT USE rechargeable CR123A batteries.

Follow this short step-by-step plan to replace the battery:

  1. battery_0001_Gen2-ReleaseEngine-01 (3)The battery is in the Smart Engine in the inside knob. You can remove the Smart Engine by pressing the 2 black pins at the back of the inside knob. Press the two pins inwards to disconnect the Smart Engine. 
    Is this not working right away? It’s possible that the small screw in the inside knob is still holding the Smart Engine in place. Remove the Bold Smart Cylinder from the door completely before proceeding.
  2. battery_0000_Gen2-RemoveEngine (2)

    (Remove the small screw from the back of the large knob if it is present.) 

    battery_0003_Gen2-RemoveCover-01 (2)
  3. Slide the Smart Engine out. If the Smart Engine doesn’t come out far enough to remove it, you can use a tool — such as the hexagonal wrench provided or a small flat screwdriver — to gently push the Smart Engine further out at the height of the two pins.
  4. Open the battery compartment by sliding the black cap to the side.
  5. battery_0002_Gen2-RemoveBattery-01 (2)Remove the old battery and insert the new battery by pressing it firmly into the Smart Engine until you hear a click. Replace the battery cap and reinsert the Smart Engine into the inside knob.
  6. The Smart Engine has a notch where the inside knob has a metal guide.
  7. NOTE: Ensure that the Smart Engine is inserted far enough into the inside knob when reassembling. This is the case when the two black pins are visibly protruding from the back of the inside knob.Screenshot 2024-05-24 at 15.44.29
  8. Replace the small screw in the back of the inside knob, and then reinstall your Bold Smart Cylinder in the door if you had removed it completely.
  9. To get the new battery status in the Bold app you need to activate the lock with your phone to synchronize them. This can also be a good moment to test your lock and turn the outside knob to check if everything is working as before.