The Smart Lock takes four (4) AA Alkaline batteries and has a life expectancy of 8-12 months depending on usage.

To change your Smart Lock batteries, follow the steps below:

1. Slide the battery cover (the oval portion of the Lock labeled "SimpliSafe") off the device by pulling down on it.

   1. This will expose the batteries and allow you to replace them.

2. Once the batteries have been replaced, put the battery cover back on and slide the compartment up until it clicks into place.