Bold Smart Cylinder: what is the battery life?

Under normal use, the battery of the Bold Smart Cylinder will last for at least 2 years or 20,000 activations.

Under normal use, the battery of the Bold Smart Cylinder will last for at least 2 years or 20,000 activations. This boils down to approximately 25 activations per day. If you use the Bold Smart Cylinder a lot more often, you will obviously have to replace the battery more often.

The battery status is visible in the Bold App. You will receive a timely notification when the battery needs replacing.

The Bold Smart Cylinder requires a CR123A battery, which you can order online or purchase at all well-known DIY stores. We advise against the use of rechargeable CR123A batteries for the Bold Smart Cylinder.


Once installed, the Bold Smart Lock’s battery status is updated once per day, and it’s visible 24 hours after installation. A connection between the Bold server and the lock needs to be established — either through phone activation or a Bold Connect — for the status to be updated in the Bold app.